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CBSE Questions for Class 11 Medical Biology Locomotion And Movement Quiz 8 - MCQExams.com
CBSE
Class 11 Medical Biology
Locomotion And Movement
Quiz 8
Biceps muscles connect humerous with the ________
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Radius, ulna
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Tibia, fibula
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Pectoral girdle
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Skull
Explanation
The biceps, also known as biceps brachii lies on the front of the upper arm between the shoulder and the elbow. The biceps brachii has two heads, or origins. Both heads originate on the scapula. The long head attaches to the supraglenoid tubercle of the scapula, which is just above the space where the humerus, or upper arm, enters the shoulder. The short head attaches to the coracoid process of the scapula. Both
heads converge into one muscle, that runs the length of the humerus. The biceps brachii crosses the inside of the elbow and attaches at the radial tuberosity, which is a feature on the radius - one of the two bones (Ulna is other bone) in- the lower arm. In this way it attaches humerus with the radius and ulna.
So, the correct option is '
Radius, ulna'.
Synovial joint is exemplified by:
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Pivot joint
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Hinge joint
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Ball and Socket joint
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All of these
Explanation
Synovial joints
are the most common type of
joint
in the body. At
synovial joints
, the articular surfaces of bones are covered with smooth articular cartilage. This gives the bones of a
synovial joint
the ability to move smoothly against each other, allowing for increased
joint
mobility.
Synovial joints are classified into six different categories on the basis of the shape and structure of the joint. These joints can be described as planar, hinge,
pivot
,
condyloid
, saddle, or
ball-and-socket joints
.
So, the correct option is D.
Which one of the following is the correct description of a certain part of a normal human skeleton ?
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Parietal bone and the temporal bone of the skull are joined by fibrous joint.
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First vertebra is axis which articulates with the occipital condyles.
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The 9th and 10th pairs of ribs are.called the floating ribs.
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Glenoid cavity is a depression to which the thigh bone articulates.
Explanation
Fibrous joints are connected by dense connective tissue consisting mainly of collagen, also called immovable joints.
So, the correct option is '
Parietal bone and the temporal bone of the skull are joined by fibrous joint.'.
Consider the following four statements (i) - (iv) and select the correct option.
(i) Actin is present in the thin filament.
(ii) H-zone of striated muscle fibre represents both thick and thin filaments.
(iii) There are 11 pairs of ribs in man.
(iv) Sternum is present on the ventral side of the body.
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(i) F (ii) F (iii) T (iv) F
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(i) F (ii) F (iii) F (iv) T
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(i) T (ii) F (iii) F (iv) T
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(i) T (ii) F (iii) T (iv) F
Explanation
The sarcomere is composed of two types of filaments, myosin (thick filament) and actin (thin filament).
The H zone in the middle of the A band is a little lighter in colour because the thin filaments do not extend into this region.
There are 12 pairs of ribs in man.
The sternum is present on the ventral side of the body while the vertebral column is present on the dorsal side.
So, the correct answer is option C.
The type of joint between the human skull bones is called:
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cartilaginous joint
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hinge joint
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fibrous joint
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synovial joint
Explanation
The type of joint between the human skull bones is called 'fibrous joint'. So, the correct answer is (c).
Which one of the following is not a disorder of bone?
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Arthritis
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Osteoporosis
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Rickets
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Atherosclerosis
Explanation
Atherosclerosis is not related to bone disorder. It is a condition related to arteries. Atherosclerosis is a condition where the arteries become narrowed and hardened due to a buildup of cholesterol around the artery wall.
Arthritis is the inflammation of joints.
Rickets is the disease in which weak and soft bones, stunted growth, and, in severe cases, skeletal deformities can be present. It is caused by deficiency of vitamin D.
Osteoporosis is a skeletal disorder in which bones get weak. It is caused by the deficiency of calcium and vitamin D.
Arthritis, rickets, and osteoporosis are diseases related to the bone disorder.
So, the correct answer is 'Atherosclerosis'.
In the resting muscle fibre, tropomyosin partially covers
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Calcium binding sites on troponin
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Actin binding sites on myosin
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Myosin binding sites on actin
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Calcium binding sites on actin.
Explanation
Tropomyosin is a protein found in the actin filaments in muscles.
The molecule contains two elongated strands that run along the length of the filament. When the muscle is at rest, the tropomyosin molecule covers the binding site of the actin molecule, where interaction with myosin occurs.
On contraction of the muscle, the tropomyosin is displaced by another protein, troponin, allowing the interaction of actin with myosin.
So, the correct answer is (c).
Our back bone consists of $$33$$ special bones most of which have cartilage tissue between them. What are the bones of the backbone called?
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Ribs
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Phalanges
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Vertebrae
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Tarsals
Explanation
Vertebrae are the 33 individual bones that interlock with each other to form the spinal column. The vertebrae are numbered and divided into regions viz:
Cervical, thoracic, lumbar sacrum and coccyx.
Which of the following endocrine gland is associated with tetanus?
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Islets of Langerhans
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Thyroid gland
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Parathyroid gland
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Adrenal gland
Explanation
Symptoms of tetanus include
a)Tetanus often begins with mild spasms in the jaw muscles known as lockjaw. The spasms can also affect the facial muscles and experience spasms and stiffness in various muscles, especially those in jaw, abdomen, chest, back, and neck.
b)Muscle cramps or spasms in your legs, fever, high blood pressure etc
Hypoparathyroidism is decreased function of the parathyroid glands with underproduction of parathyroid hormone. This can lead to low levels of calcium in the blood, often causing cramping and twitching of muscles or tetany (involuntary muscle contraction).
Hence parathyroid gland is associated with tetanus.
So, the correct answer is 'Parathyroid gland'.
Match the followings and mark the correct option.
Column I
Column II
A. Sternum
(i) Synovial fluid
B. Glenoid cavity
(ii) Vertebrae
C. Freely movable joint
(iii) Pectoral girdle
D. Cartilaginous joint
(iv) Flat bones
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A - (ii), B - (i), C - (iii), D - (iv)
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A - (iv), B - (iii), C - (i), D - (ii)
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A - (ii), B - (i), C - (iv), D - (iii)
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A - (iii), B - (i), C - (ii), D - (iv)
Explanation
The sternum is present in the thoracic basket. It is the flat bone that articulates the ribs.
Glenoid cavity is found in the pectoral girdle of the upper arm.
Freely movable joints are the ones that have synovial fluid on them and it allows larger movement directions.
cartilaginous joints are found between the vertebrae.
So, the correct option is 'A - (iv), B - (iii), C - (i), D - (ii)'
Choose the correct answer from the alternatives given.
Bile is stored in
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Gall bladder
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Duedenum
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Liver
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Spleen
Which of the following characteristics can be related to cartilaginous joints?
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Permit slight movements
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Are found between the bodies of vertebrae
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Are found in symphysis
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All of the above
Explanation
In cartilaginous joints, the 2 joints are joined by cartilage, either hyaline cartilage or fibrocartilage. It lacks joint cavity. It is of 2 types, synchondrosis and symphysis. In synchondrosis joints, the bones are joined by hyaline cartilage. In symphysis, the bones are joined by fibrocartilage. These joints permit slight movements. Joint between the manubrium and the sternum, intervertebral discs and the symphysis are examples of cartilaginous joints.
Thus, the correct answer is 'All of the above.'
Which of the following is the longest bone in our body?
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Tibia
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Fibula
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Femur
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Humerus
Explanation
The thigh bone (Femur) is almost 19.9 inches long and is the longest bone in the human body. It runes from the hip down to around the knee area.
Which of the following pair is incorrect in relation to diseases and related symptoms-
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Rheumatoid arthritis - accumulation of pannus granules
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Rickets - Incomplete and insufficient deposition of calcium and phosphate into bones
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Gouty Arthritis - Deposition of urea into joints
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Osteoporosis - Deficiency of vitamin D
Explanation
Rheumatoid arthritis affects joint linings, causing pain and swelling. Over long periods of time, this can cause bone erosion.
So, option A is the correct option.
In the sarcoplasmic reticulum of resting muscle, Ca$$^{2+} $$ are held together by which protein?
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Nebulin
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Desmin
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Calsequestrin
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Calmodulin
Explanation
In the sarcoplasmic reticulum of resting muscle, Ca2+ are held together by calmodulin. Calmodulin is also called as calcium-modulated protein, is a calcium-binding protein present in the cytoplasm. It is present in all eukaryotic cells.it's the function is to bind calcium ions in resting muscle. when the motor impulse is generated and reached to neuromuscular junctions calcium is released from calmodulin which facilitates muscle contraction.
So, the correct answer is 'Calmodulin'.
Which of the following proteins is found in the thick filaments of skeletal muscle?
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Actin
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Troponin
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Myosin
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Tropomyosin
Explanation
A skeletal muscle is made up of different types of proteins. The thick filaments are made up of myosin while the thin filament is made up of three proteins actin, troponin, and tropomyosin. So, the correct answer is 'Myosin'.
Select the correct option for contractile proteins from the given diagram labelled as (a) and
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a = G - actin; b = F - actin
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a = Meromyosin; b = Myosin
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a = Tropomyosin; b = Troponin
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a = Troponin; b = Tropomyonin
Explanation
Contractile proteins of muscle are actin and myosin. Actin is the main component of thin filaments and myosin is the main component of thick filaments. The given figure is of actin filament. There is usually one troponin per 6-8 actin molecules. In this, troponin (b) is attached to the protein tropomyosin (a). It is present within the groove between actin filaments. The main function of tropomyosin is to prevent contraction during relaxed condition by blocking the attachment site for the myosin crossbridge.
Thus, the correct answer is 'a = Tropomyosin; b = Troponin.'
ATP binding site is located on/associated with
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Troponin
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Tropomyosin
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Head part of meromyosin
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Tail part of myosin
Explanation
So, the correct answer is 'Head part of meromyosin'.
Which fibres, contractile in nature are found in muscles?
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White fibres
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Myofibrils
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Micro fibrils
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Elastic fibres
Explanation
Contractile fibres are those fibres which are capable in contraction of the muscles.
Fibres
Nature
White fibres (form of mature connective tissue)
Ineslastic
Myofibrils (skeletal muscle)
Contractile
Micro fibrils (surface of primary cell wall)
elastic
Elastic fibres (bundle of connective tissue)
elastic
So, the correct option is 'Myofibrils'
Cardiac muscle is ________.
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Neurogenic
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Myogenic
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Voluntary
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Unbranched
Explanation
Cardiac muscles are the heart muscle which is also known as myocardium. It is involuntary striated muscles- Involuntary because the action is not controlled by the conscious mind and straited because it contracts in a similar manner to the skeletal muscle.
The cardiac muscle forms the major organ of the human body that is the heart.
The myogenic heart is the one with the cardiac muscle having automaticity and contract spontaneously. The myogenic heart is capable of generating a cardiac contraction independent of neurons whereas neurogenic heart requires nerve input to contract.
Humans have a myogenic heart.
So, the correct option is B.
Myoglobin is found in?
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Muscles
0%
Blood
0%
Lungs
0%
RBCs
Explanation
Myoglobin is a protein found in muscles of almost all mammals that binds to both iron and oxygen.
It is also made up of heme and globin protein.
The main function of myoglobin is binding to oxygen and carrying it to different muscle tissues.
So, the correct answer is 'Muscles'.
Read the following statement (A-D) with regards to muscles.
Choose the correct option.
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I-bands are isotropic bands and made by actin filaments.
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A-bands are anisotropic bands and made by both actin and myosin filaments.
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In between I-bands thin fibrous M-line is present.
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In between A-bands, thin fibrous M-line is present.
Explanation
Sarcomere is consist of regular strands of contractile proteins. They are divided into units that are bordered by I bands which are bisected by Z discs and A band with a dark M in the center. I bands are isotropic bands made by actin filament, troponin and tropomyosin.
So, option A is the correct option.
Joints between human skull bones are
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Saddle
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Gliding
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Imperfect
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Immovable
Explanation
A. Saddle joint allows movement on many directions and is present between carpals and metacarpals of the human thumb.
B. Gliding joint allows movement only in one direction and is present between tarsal and carpals.
C. Imperfect joint or Cartilaginous joint are joined together with the help of a disc of cartilage which restricts the movement and shows limited or slight movement and is present between the adjacent vertebrae of the vertebral column and in pubic symphysis.
D. The immovable joint does not allow any movement because the bones are firmly fixed together by strong collagen fibers and are present in the skull bones called as sutures.
So, the correct option is D.
This is diagnosed by the presence of a type of IgM.
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Osteoporosis
0%
Gout
0%
Osteoarthritis
0%
Rheumatoid arthritis
Explanation
D. Rheumatoid arthritis
EXPLANATION: IgM is a better predictor of rheumatoid arthritis. Patients with rheumatoid arthritis have higher immunoglobulin IgA, IgM and IgG concentrations. Anti-CCP antibodies can also be used to diagnose rheumatoid arthritis.
Gliding joints show ________ movement.
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Nonaxial
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Uniaxial
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Biaxial
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Multiaxial
Explanation
C. Biaxial
Reason: A biaxial joint allows for motions within two planes. Examples of biaxial joint include plane joint. A plane joint (also known as arthrodial joint, gliding joint or plane articulation) is a synovial joint which allows only gliding movement in the plane of the articular surfaces. The opposed surfaces of the bones are flat or almost flat, with movement generally limited by tight capsules and ligaments. Plane joints are numerous, are most often small, and allow very little motion. Examples include the carpal joints of the wrist, the tarsal joints of the ankle, and the facet joints of the spine.
Which of the following are the regulatory protein in the muscle contraction?
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Troponin and tropomyosin
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Troponin and actin
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Myosin and tropomyosin
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Actin and tropomyosin
Explanation
Actin and myosin are the contractile proteins, and they interact with each other, causing contraction, while troponin and tropomyosin are regulatory proteins that regulate the interaction between actin and myosin.
Myofilaments(actin and myosin) are packed in functional units of striated muscle referred to as sarcomeres.
Hence, Troponin and tropomyosin are the regulatory protein in muscle contraction.
So, the correct answer is 'Troponin and tropomyosin'.
Select the option where the property describing muscle fibres is not associated with wall of stomach.
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Presence of actin and myosin fibrils
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Branched, multinucleated appearance
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Presence of cell junctions
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Involuntary nature
Explanation
The layers of stomach wall include serosa, muscularis, submucosa, and mucosa these are involuntary in nature and show the presence of cell junctions also, the muscularis layer shows branched and multinucleated appearance.
However, the presence of actin and myosin fibrils is seen in smooth muscles.
So, the correct answer is 'Presence of actin and myosin fibrils'.
Typical characteristic of thecodont teeth is ________ joint.
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Gomphosis
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Syndesmoses
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Amphiarthrosis
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Synchondroses
Explanation
A. Gomphosis
Reason: Gomphosis is the specialized fibrous joint that anchors the root of a tooth into its bony socket within the both maxillary bone or upper jaw and mandible bone or lower jaw of the skull. A gomphosis is also known as a peg-and-socket joint. It is usually found in case of thecodont dentition. It is a morphological arrangement in which the base of the tooth is completely enclosed in a deep socket of bone. Examples include living crocodilians and mammals.
Largest muscle of our body is?
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Sartorius
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Masseter
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Deltoideus
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Gluteus maximus
Explanation
The gluteus maximus
is the largest muscle in the human body. It is large and powerful because it has the job of keeping the trunk of the body in an erect posture. It is the chief antigravity muscle that aids in walking up stairs.
Hence the correct option is D.
The only movable bone in the skull is?
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Mandible
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Maxilla
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Ethmoid
0%
Sphenoid
Explanation
A.Mandible or jaw bone-is the only movable bone of the skull, forming the temporomandibular joint with the temporal bone.
So correct answer is option A.Mandible
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