MCQExams
0:0:1
CBSE
JEE
NTSE
NEET
Practice
Homework
×
CBSE Questions for Class 9 Biology Tissues Quiz 2 - MCQExams.com
CBSE
Class 9 Biology
Tissues
Quiz 2
Major constituent of bone is:
Report Question
0%
Ca
0%
Mg
0%
Zn
0%
Fe
Explanation
The mineral constituent of bone is composed of a salt of calcium and phosphorus called calcium phosphate. This makes the bony framework hard and strong.
Thus, the correct answer is option A.
The types of fibres found in connective tissues are:
Report Question
0%
Collagen fibres
0%
Elastic fibres
0%
Reticular fibres
0%
All of the above
Explanation
The fibrous components in connective tissue are of three types - collagenous, elastic and reticular.
Collagen is secreted in the form of tropocollagen molecules by the fibroblasts and then they assemble extracellularly to form striated collagen fibrils.
Elastic fibres are composed of the protein elastin and differ from collagenous fibres in dimensions, pattern and chemical composition.
Reticular fibres are distinguished by their tendency to form fine-meshed networks around cells and cell groups.
Thus, the correct answer is option D.
The areolar tissue connects:
Report Question
0%
Two bones
0%
Muscle and the bone
0%
Muscle and the fat tissue
0%
Skin to the muscles beneath
Explanation
Areolar tissue is loose connective tissue found between skin and muscles.
It is found in many locations around the body. One important area is the skin, which binds the outer layers of the skin to the muscles beneath.
It also helps fill space in organs and provides support.
So, the correct answer is option D.
Which of the following cells is not phagocytic in nature?
Report Question
0%
Mast cell
0%
Red blood cell
0%
Macrophage
0%
Neutrophil
Explanation
Phagocytes are derived from stem cells in the bone marrow. Phagocytes of humans and other jawed vertebrates are divided into "professional" and "non-professional" groups based on the efficiency with which they participate in phagocytosis.
The professional phagocytes are the monocytes, macrophages, neutrophils, tissue dendritic cells, and mast cells. The non-professional phagocytes are the epithelial and endothelial cells.
Red blood cells do not possess phagocytic activity. RBC carries oxygen to different cells in the body.
Thus, the correct answer is option B.
Which statement is incorrect?
Report Question
0%
Mast cells and basophils secrete histamine and heparin.
0%
Mast cells are long Iived, basophils are short lived.
0%
Mast cells are smaller than basophils with a bilobed nucleus.
0%
Mast cells are relatively sessile, basophils are mobile.
Explanation
Mast cells and basophils are major cells in the early phases of immediate hypersensitivity reactions. Mast cell is very similar to basophils in functions. Both are granulated cells, that contain heparin and histamine, which are anticoagulant. So, option A is correct. Mast cells are long lived cells, while basophils are short lived (compared to mast cells). So, option B is correct. Mast cells are fixed in tissues, while the basophils circulate in blood. So, option D is correct. Mast cells are bigger than basophils. They are 10uM in size and have round nuclei. So, option C is incorrect.
Thus, the correct answer is option (C), 'Mast cells are smaller than basophils with a bilobed nucleus'.
A connective tissue
Report Question
0%
Has no matrix
0%
Made of single type of cells
0%
Has abundant matrix
0%
Both B and C
Explanation
Correct option: C
Explanation:
Connective tissues are most abundant and widely distributed in complex animal bodies. They range from soft connective tissues to specialized connective tissues like cartilage, bone, adipose and blood.
Except in blood, the fibres of collagen secrete polysaccharides, which accumulate between the cells and forms an abundant matrix or ground substance.
Thus, option C is correct.
Which of the following is a loose connective tissue?
Report Question
0%
Areolar
0%
Adipose
0%
Blood
0%
Both A and B
Explanation
Areolar tissue is a type of connective tissue, that takes part in the structural framework of the body.
It consists of a meshwork of collagen, elastic fibers, and reticular fibers with many connective tissue cells in between the meshwork of fibers.
Fibroblasts, plasma cells, adipocytes, mast cells, and macrophages are the major cells of the areolar tissue.
Adipose tissue helps in the storage of fat and protects the internal organs from injury.
Both of them belong to the class of loose connective tissue.
On the other hand, blood is a type of fluid connective tissue.
Hence, the correct option is D.
Mast cells are found in:
Report Question
0%
Connective tissue
0%
Muscular tissue
0%
Nervous tissue
0%
Epithelial tissue
Explanation
Connective tissue connects various tissues by supporting, protecting and giving structure to other tissues. The cells of connective tissue are
loosely spaced and embedded in an
intercellular matrix which may be jelly-like, fluid, dense or rigid, based on its function. Mast cells are a part of areolar connective tissue which is found between the skin and muscles, around blood vessels
and nerves
.
So, the correct answer is option A.
Which of the following work as phagocytes?
Report Question
0%
WBCs
0%
RBCs
0%
Enzymes
0%
Hormones
Explanation
White blood cells or WBCs are the cells of the immune system, that are involved in defending the body against infections. There are different types of WBCs such as eosinophils, neutrophils, lymphocytes, monocytes etc.
Here, certain cells like monocytes are involved in the process of phagocytosis.
Red blood cells or RBCs are the cells that are the principal means of delivering oxygen.
Enzymes are macromolecular biological catalysts.
The hormone is the class of signalling molecule produced by glands that are transported to various organs by the circulatory system to regulate physiology and behaviour.
Thus, the correct answer is option A.
Which one of the following cells is not capable of metabolizing glucose to carbon dioxide aerobically?
Report Question
0%
White blood cells
0%
Unstriated muscle cells
0%
Liver cells
0%
Red blood cells
Explanation
Red blood cells at maturity lose all the cell organelles and space inside the cell is occupied by haemoglobin. Since RBCs lack mitochondria they cannot metabolize glucose to carbon dioxide aerobically.
So, the correct answer is '
Red blood cells'
Mark the odd one from the following.
Report Question
0%
Monocytes
0%
Lymphocytes
0%
Neutrophils
0%
Erythrocytes
Explanation
Monocytes are a type of WBCs. Monocytes mature in different types of macrophages.
Lymphocytes are B- cells or T- cells and they have receptors on their surface and are able to bind antigens and thus help the foreign substance to get removed from the body.
Neutrophils are the most abundant type of WBCs. They are phagocytic in nature and are able to engulf foreign substances.
Erythrocytes are red blood cells, that are involved in delivering the oxygen to various tissues.
So, the first three are WBCs that are involved in the immune system, as they help in eliminating various antigens, while the latter is not involved in the immune response.
Thus, the correct answer is option D.
The pH of the blood is maintained by balancing the ratio of
Report Question
0%
Lactic acid and pyruvic acid
0%
NaHCO$$_{3}$$ and H$$_{2}$$CO$$_{3}$$
0%
Pyruvic acid and H$$_{2}$$CO$$_{3}$$
0%
Both A and B
Explanation
There is bicarbonate buffering system, which is an important buffer system in the acid-base homeostasis.
In this system, carbon dioxide, CO$$_{2}$$, combines with water (H$$_{2}$$O) to form carbonic acid (H$$_{2}$$CO$$_{3}$$), which in turn rapidly dissociates to form hydrogen ion, H$$^+$$ and bicarbonate ion, HCO$$_{3}$$ as:
CO$$_{2}$$ + H$$_{2}$$O --> H$$_{2}$$CO$$_{3}$$ --> HCO$$_{3}$$$$^-$$ + H$$^{+}$$
This reaction is reversible and is catalyzed by the enzyme carbonic anhydrase.
The most important constituents of blood that keep the pH value within the limits of 6.8 - 7.8 are formed by the sodium bicarbonate (NaHCO$$_{3}$$) and carbonic acid (H$$_{2}$$CO$$_{3}$$). When the proportion of carbonic acid increases, the blood will become acidic. If that happens, one automatically starts to breathe more deeply to get rid of more carbon dioxide through the lungs and to become less acidic. When acidification continues the alkaline buffer, formed by sodium bicarbonate, ensures that the acid in the blood is neutralized.
Thus, the correct answer is option B.
Shape of the nucleus of WBC is usually:
Report Question
0%
Spherical
0%
Irregular
0%
Oval
0%
Spindle shaped
Explanation
The shape of the nucleus of WBCs is irregular. Different types of WBC have different shapes. Nuclei may be bilobed, trilobed, pentalobed, kidney-shaped, or round it depends on the WBC.
WBC
Shape (nucleus)
Neutrophils
Multinucleated
Eosinophils
Bi-lobed
Monocytes
Kidney shaped
Thrombocytes
Eccentric
Basophils
Bi-lobed or tri-loped
Thus, the correct answer is option B.
Squeezing of leucocytes out from the endothelium of capillaries to fight foreign agents is known as
Report Question
0%
Haemolysis
0%
Diapedesis
0%
Phagocytosis
0%
Rouleaux
Explanation
Haemolysis is the destruction of red blood cells so that the haemoglobin is freed into the surrounding medium.
Diapedesis is the migration of blood cells, especially WBCs (leucocytes), through the intact walls of blood vessels into the surrounding tissue to fight foreign agents.
Phagocytosis is the process by which phagocytes ingest or engulf other cells or particles.
Rouleaux are stacks or aggregations of RBCs, which form because of the unique discoid shape of the cells.
Thus, the correct answer is option B.
Heparin is secreted by
Report Question
0%
Blood cells
0%
Mast cells
0%
Kidney
0%
Nerve cells
Explanation
Heparin is a mucopolysaccharide or glycosaminoglycan which is an anticoagulant. It is usually stored in the secretory granules of the mast cells and released into the vasculature at the sites of tissue injury.
So, the correct answer is option B.
Reticulocytes may also be called
Report Question
0%
Blood platelets
0%
Immature erythrocytes
0%
Lymphocytes
0%
WBCs
Explanation
Reticulocytes are immature red blood cells or erythrocytes, which compose about 1% of the red cells in the human body.
They develop and mature in the red bone marrow and then circulate for about a day in the bloodstream before developing into mature red blood cells.
Thus, the correct answer is option B.
The main function of the white blood cells in the human intestine system is to :
Report Question
0%
Combat and destroy antigenic particles.
0%
Produce antigens to combat antibodies.
0%
Carry oxygen around the body.
0%
Transport antigens to B memory cells in the lymph nodes.
Explanation
White blood cells or leucocytes are colourless, irregularly shaped and bigger sized cells than the RBC containing nucleus. WBCs are the cells, that help the body to fight infections. They combat and destroy the antigenic particles.
Thus, the correct answer is option A.
Which of the following is correct?
Report Question
0%
Blood has WBC and lymph has RBC.
0%
Blood has WBC, RBC and lymph have nothing.
0%
Blood has RBC, WBC and lymph have WBC.
0%
Lymph has WBC, RBC and blood have RBC.
Explanation
Blood is a fluid that has blood cells, such as WBCs, RBCs, and platelets, which are suspended in blood plasma.
Lymph is the blood fluid that oozes through blood vessels into the tissue spaces and after circulating through the lymphatic system is returned to blood circulation.
Lymph contains WBCs and lacks RBCs because the RBCs are too big to pass through the spaces in the blood vessels.
Thus, the correct answer is
option
(B).
Haversian canals are found in:
Report Question
0%
Adipose tissue
0%
Cartilage
0%
Bone matrix
0%
Areolar tissue
Explanation
Correct option: C
Explanation:
Haversian canals are a series of tubes around narrow channels that are formed by the lamellae in the bones. They are found in Bone matrix.
Adipose tissue is body fat present beneath the skin and around internal organs. Haversian canals are absent in these tissues.
Cartilage is formed by the deposition of calcium salts in the matrix around the joints. It create a low-friction environment and allows fluid bending/straightening motions against external stress. Haversian canals is absent.
Areolar tissue are fibers which are loosely arranged in a network to support other tissues. Haversian canals is absent in areolar tissues.
Thus, Option C is correct.
Which one of the following is not essentially a part of nervous system?
Report Question
0%
Cyton
0%
Axon
0%
Myelin sheath
0%
Intermedin
Explanation
A nerve cell or neuron is the structural and functional unit of the nervous system. It has a cell body called cyton and two types of processes called axon and dendrite. Dendrites are the short cytoplasmic processes of the cell body, which receive stimulus from other neurons. The axon is a long extension of a neuron and may be covered by a lipid-rich membrane, called a myelin sheath.
Intermedin, on the other hand, is a hormone produced by the intermediate lobe of the pituitary gland in certain vertebrates. It is also known as melanocyte-stimulating hormone.
Thus, the correct answer is option D.
Nodes of Ranvier are found in
Report Question
0%
Non-myelinated nerve fibres
0%
Myelinated nerve fibres
0%
Both A and B
0%
None of the above
Explanation
Correct option: B
Explanation:
Nodes of Ranvier are found in Myelinated nerve fibres.
The gaps between two
adjacent myelin sheaths are called nodes of
Ranvier
Non-myelinated nerve fibres are enclosed by a Schwann cell that does not form a myelin sheath around the axon. Nodes of Ranvier is absent in them.
Thus, Option B is correct.
Commonly known as body fat:
Report Question
0%
Alveolar tissue
0%
Lymph glands
0%
Adipose tissue
0%
Liver cells
Explanation
Adipose tissue is commonly known as body fat.
It is a specialized connective tissue consisting of lipid-rich cells called adipocytes. As it comprises about 20-25% of total body weight in healthy individuals, the main function of adipose tissue is to store energy in the form of lipids (fat).
Hence, the correct option is C.
Neuron is different from the muscle, due to the presence of:
Report Question
0%
Alternate dark and light bands
0%
Contractile proteins
0%
Both A and B
0%
Dendrites
Explanation
Alternate light and dark bands are present only in skeletal muscles. Muscles contain special proteins called contractile proteins.
Dendrites are the short cytoplasmic extensions of the cell body of a neuron, which receive stimulus from other neurons. Dendrites are part of a nerve fibre, not a muscle fibre.
Thus, the correct answer is option D.
The area where the myelin sheath is absent in the nerve fibre is called ________.
Report Question
0%
Axon
0%
Cyton
0%
Dendrites
0%
Node of Ranvier
Explanation
A nerve cell (neuron) comprises a cyton (cell body), dendrites, and a single nerve fibre or axon. Some nerve fibres have a covering of the myelin layer that insulates the axons. Nodes of Ranvier are small gaps found in such myelinated axons. They propagate the transmission of nerve impulses.
Thus, the correct answer is option (D), 'Node of Ranvier'.
The endothelium of blood vessel is composed of __________________.
Report Question
0%
Cuboidal epithelium
0%
Squamous epithelium
0%
Columnar epithelium
0%
Ciliated epithelium
Explanation
Endothelium is made of single layer of squamous epithelial cells through which diffusion of gases takes place at the tissues and alveoli.
Hence the correct option is B.
Myelin sheath covers ____________.
Report Question
0%
Muscle cells
0%
Axon of some neurons
0%
Blood vessels
0%
Osteocytes
Explanation
Axons of neurons can be either myelinated or non-myelinated.
Myelin sheath is made up of proteins and fatty substances.
It allows electrical impulses to transmit quickly and efficiently along the nerve cells.
So, the correct answer is option 'B'.
The muscles involved in the movement of the arm are
Report Question
0%
Unstriped
0%
Striped
0%
Cardiac
0%
None of the above
Explanation
Striated muscle or skeletal muscle is the most common and widely distributed muscle tissue in the body. It forms all of the skeletal muscles, such as biceps. Striated muscle is voluntary muscle. All conscious movements of the body, including the movement of the arm, legs, facial expressions, eye movements and swallowing are the products of the skeletal or striated muscle tissue.
Thus, the correct answer is option B.
Smooth muscles are not:
Report Question
0%
Spindle shaped
0%
Under control of autonomic nervous system
0%
Very simple in structure
0%
Multinucleated
Explanation
Correct option: D
Explanation:
Smooth muscle are involuntary muscles that shows no cross stripes under microscopic observation. It consists of narrow spindle-shaped cells with a single, centrally located nucleus.
It is under control of autonomic nervous system and simple in structure.
Thus,
Smooth muscles are not multinucleated
. Option D is correct.
Smooth muscle fibres are
Report Question
0%
Cylindrical, unbranched, striated, multinucleate and voluntary
0%
Spindle-shaped, unbranched, non-striated, uninucleate and involuntary
0%
Cylindrical, unbranched, non-striated, multinucleate and involuntary
0%
Spindle-shaped, unbranched, striated, antinuclear and voluntary
Explanation
Correct option: B
Explanation:
Smooth muscle fibres are Spindle-shaped, unbranched, non-striated, uninucleate and involuntary.
It is found in the walls of hollow organs like stomach, intestines and in tracts of the respiratory system.
Thus, Option B is correct.
Striped muscles have:
Report Question
0%
One nucleus
0%
Many nuclei
0%
Two nuclei
0%
No nucleus
Explanation
Each striated muscle cell is long and cylindrical.
The striated muscle cells are multinucleated, i.e. have many nuclei.
These nuclei control the activities of the muscle cell. Several mitochondria are present to meet the energy requirements of these cells.
Thus, the correct answer is option B.
Which of the following is not a part of areolar tissue?
Report Question
0%
Macrophages
0%
Nerve cell
0%
Plasma cell
0%
Collagen fibre
Explanation
Areolar tissue is loose, irregularly arranged connective tissue. It consists of collagen, elastin, and reticular fibres. It is strong enough to bind different tissue types together, and yet soft enough to provide flexibility and cushioning.
Macrophages, plasma cells, and collagen fibres are all components of areolar tissues whereas, a
nerve cell is not.
So, the correct option is B.
The muscles immune to fatigue are:
Report Question
0%
Striped
0%
Non-striped
0%
Cardiac
0%
None of the above
Explanation
Correct option: C
Explanation
:
The muscles immune to fatigue are: Cardiac.
Cardiac muscle tissues occur only in heart and are controlled involuntarily. Fibres of these muscle contain large number of mitochondria. They continuously function without being stimulated by nerve impulse and cannot get fatigued.
Striped muscles are voluntary muscles, capable of fast contraction. These muscles get easily fatigued due to excessive contraction. Ex- skeletal muscles.
Non-striped muscles are involuntary muscles and covers the lining of the internal organs. ex- smooth muscles.
Thus, Option C is correct.
Striated muscles are:
Report Question
0%
Syncytial
0%
Uninucleate
0%
Binucleate
0%
Anucleate
Explanation
A syncytium is a single cell that contains multiple nuclei.
A striated muscle fibre has many nuclei and hence, it is a
syncytium.
So, the correct answer is A.
Striated and voluntary muscles are found in:
Report Question
0%
Lungs
0%
Leg muscles
0%
Gall bladder
0%
Blood vessels
Unstriped muscles are found in ____________.
Report Question
0%
Neck
0%
Urinary bladder
0%
Arms
0%
Fingers
Explanation
Unstriped muscles are smooth muscles that contract without conscious control arranged in the form of thin layers or sheets.
These are made up of spindle-shaped, unstriated cells with a single nucleus and are found in the walls of the internal organs, such as the stomach, urinary bladder, intestine, and blood vessels (except for the heart).
They are capable of slow rhythmic involuntary contractions.
Thus, the correct answer is option B.
Cardiac muscles have some characteristics of:
Report Question
0%
Skeletal muscles
0%
Smooth muscles
0%
Both A and B
0%
Nerve fibers
Explanation
Correct option: C
Explanation:
Cardiac muscles are striated like in skeletal muscles.
And involuntary like in smooth muscles.
Thus, It have both characteristics of skeletal and smooth muscles. Option C is correct.
Which of the following tissue is multinucleated?
Report Question
0%
Cardiac muscle tissue
0%
Skeletal muscle tissue
0%
Smooth muscle tissue
0%
Both A and C
Explanation
Cardiac muscle tissue are found in the wall of the heart. These are uninucleated and lie near the centre. Each fibre is a long and cylindrical structure that has a definite sarcolemma.
Skeletal muscle tissue are found in the limbs, body walls. These are multinucleated. Each muscle fibre is an elongated cell surrounded by a delicate membrane sarcolemma.
Smooth muscle tissue are non-striated muscle. These are uninucleated and surrounded by the cytoplasm. Each fibre is enclosed by the plasma membrane.
So, the correct answer is option B.
The structural and functional unit of the striated muscle fibre is called as
Report Question
0%
Sarcolemma
0%
Sarcomere
0%
Sarcoplasm
0%
Myofibril
Explanation
The sarcolemma is the cell membrane of a striated muscle fibre cell.
The sarcoplasm of a muscle fibre is like the cytoplasm of other cells and it houses large amounts of glycosomes.
A myofibril is a basic rod-like unit of a muscle. Myofibrils comprise of repeating sections of sarcomeres.
These sarcomeres appear as alternating dark and light bands under the microscope and are responsible for muscle contractions. Hence, considered the structural and functional unit of the striated muscle fibre.
Thus, the correct answer is option B.
Unstriated muscles are found in:
Report Question
0%
Veins
0%
Arteries
0%
Uterus
0%
All of the above
Explanation
Smooth muscles are the muscle tissues that contract involuntarily (without conscious control). Unlike skeletal muscles, alternate light and dark bands are not present in smooth muscles. Hence, the term 'unstriated' is used for describing smooth muscles. Smooth muscles are found in the walls of the internal organs (
except for the heart),
such as the stomach, uterus, bladder, intestine, and blood vessels (veins, arteries).
Thus, the correct answer is option D.
Which of the following set clearly identifies the striated muscles?
Report Question
0%
Cylindrical, multinucleated and unbranched
0%
Spindle-shaped, unbranched and uninucleated
0%
Cylindrical, striped and uninucleated
0%
Cylindrical, striped and branched
Explanation
Striated muscles are skeletal muscles, which appear striated when viewed under the microscope. Their cells are cylindrical, unbranched and are multinucleated (syncytial). These muscles are capable of voluntary, quick, forceful contractions.
Thus, the correct answer is option (A)- 'Cylindrical, multinucleated and unbranched'.
Hypertrophy of muscle is the condition wherein
Report Question
0%
Muscles become thin and weak due to excessive work.
0%
Muscles become thick and strong due to excessive work.
0%
Muscles become thin and weak due to no work.
0%
Muscles become thick and strong due to no work.
Explanation
Muscle hypertrophy is a term for the growth and increase of the size of the muscle cells. The most common type of muscular hypertrophy occurs as a result of physical exercise such as weight lifting.
When someone starts exercising, there is an increase in the nerve impulses that cause muscle contraction. This results in strength gains without noticeable change in muscle size.
As one continues to exercise, there is a complex interaction of nervous system responses, that result in an increase in protein synthesis over months and the muscle cells begin to grow larger and stronger.
Thus, the correct answer is option B.
In the resting muscle fibre, tropomyosin partially covers
Report Question
0%
Calcium binding sites on troponin
0%
Actin binding sites on myosin
0%
Myosin binding sites on actin
0%
Calcium binding sites on actin
Explanation
When the muscle is at rest, tropomyosin prevents the interactions between thin and thick filaments. Tropomyosin is a double-helical protein that covers the active sites for myosin on the individual actin molecules, thus preventing the actin-myosin interaction necessary for the contraction of muscle.
Thus, the correct answer is option C.
Cardiac muscle fibres differ from skeletal muscles because these are:
Report Question
0%
Involuntary
0%
Striated and voluntary
0%
Non-striated and voluntary
0%
Antagonistic
Explanation
Cardiac muscles have the property of both the striated muscles (skeletal muscle) and unstriated muscles (smooth muscle). C
ardiac muscle is involuntary like smooth muscle and has striations like skeletal muscle.
Thus, the correct answer is option A.
Different types of muscle tissues include:
Report Question
0%
Unstriated and striated
0%
Striated and cardiac
0%
Cardiac and unstriated
0%
Unstriated, striated and cardiac
Explanation
There are three types of muscle tissue - smooth or unstriated, skeletal or striated, and cardiac.
Smooth or unstriated muscles line the walls of internal organs like the stomach, intestine, lungs, etc. They are spindle-shaped involuntary muscles.
Skeletal or striated muscles are
voluntary muscles
attached to the skeleton. They help in the movement of bones and the body.
Cardiac muscles are involuntary muscles located in the walls of the heart. They appear striated and are branched.
Thus, the correct answer is option D.
Myoglobin is found in
Report Question
0%
Muscles
0%
Blood
0%
Liver
0%
Spleen
Explanation
Myoglobin is a protein found in the muscle cells of animals. It functions as an oxygen-storage unit, providing oxygen to the working muscles.
Thus, the correct answer is option (A), 'Muscles'.
The muscles present in our:
Report Question
0%
Thigh, are striated and voluntary.
0%
Upper arm, are smooth muscle fibres, fusiform in shape.
0%
Heart, are involuntary and unstriated.
0%
Intestine, are striated and involuntary.
Explanation
The muscles in the upper arm and shoulder are striated muscles and not smooth muscles. Also, these are triangular in shape.
So, option B is incorrect.
Heart possesses unique muscles, called cardiac muscles, which are involuntary striated muscles. So, option C is incorrect.
The intestinal muscles are involuntary and are smooth muscles. So, option D is incorrect.
The muscles present in the thigh are striated and voluntary.
Hence, the correct answer is option A.
Bone matrix is rich in
Report Question
0%
Fluoride and calcium
0%
Calcium and phosphorus
0%
Calcium and potassium
0%
Phosphorus and potassium
Explanation
The bone matrix contains bone minerals also known as hydroxyapatite, which consists of mainly calcium and phosphorus with trace amounts of sodium, magnesium, and bicarbonate. Fluorides, potassium and phosphorous are not found insignificant amounts in the bone.
Hence the correct option is B.
Which of the following is not a function of epidermis?
Report Question
0%
Protection from adverse condition
0%
Gaseous exchange
0%
Conduction of water
0%
Transpiration
Explanation
Epidermis is a single layer of cells found on theouter layers of different parts of a plant -leaves, flowers, roots, stem, etc. Its functions are as follows:
It forms a barrier between the underlying tissues in a plant and the surrounding environment, thereby, protecting it from adverse environmental conditions.
The presence of stomata and guard cells in the epidermal tissue helps in the exchange of oxygen, carbon dioxide as well as permit transpiration.
Conduction of water and minerals in plants takes place in conducting vessels, located in the core, called xylem. Thus conduction of water is not the function of the epidermis.
Hence the correct option is C.
Which is the correct combination about the figure?
Report Question
0%
(a) Dendrite, (b) Cell body, (c) Dendron, (d) Synaptic knob
0%
(a) Dendrite, (b) Cell body, (c) Axon, (d) Synaptic knob
0%
(a) Synaps, (b) Cell body, (c) Axon, (d) Synaptic knob
0%
(a) Dendrite, (b) Myelin sheath, (c) Axon, (d) Synaptic knob
Explanation
Dendrites receive impulses. It is represented by (a).
The cell body or cyton contains the nucleus and cell organelles. It is represented by (b).
Axon (It is represented by (c)) is an elongated dendron that transfers the impulse to another nerve through a knob-like structure which is known as a synaptic knob that contains neurotransmitters (chemical transmission of signal). It is represented by (d).
So, the correct answer is option B.
While doing work and running, you move your organs like hands, legs etc. Which among the following is correct?
Report Question
0%
Smooth muscles contract and pull the ligament to move the bones.
0%
Smooth muscles contract and pull the tendons to move the bones.
0%
Skeletal muscles contract and pull the ligament to move the bones.
0%
Skeletal muscles contract and pull the tendon to move the bones.
Explanation
Smooth muscles are located in the visceral organs of the body. For example, urinary bladder, uterus, respiratory tract, etc.
These muscles are not connected to bones and do not function in movements like walking and running.
In contrast, skeletal muscles attach directly to the skeleton which synchronizes the movement of muscles with bones.
These skeletal muscles are attached to bones with a tough, flexible band of fibrous connective tissue called tendon.
When the skeletal muscles contract, it pulls the tendon attached to the bone, aiding to the movement of bones.
Thus, the correct answer is option D - '
Skeletal muscles contract and pull the tendon to move the bones.'
0:0:1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
0
Answered
0
Not Answered
0
Not Visited
Correct : 0
Incorrect : 0
Report Question
×
What's an issue?
Question is wrong
Answer is wrong
Other Reason
Want to elaborate a bit more? (optional)
Practice Class 9 Biology Quiz Questions and Answers
<
>
Support mcqexams.com by disabling your adblocker.
×
Please disable the adBlock and continue.
Thank you.
Reload page
