CBSE Questions for Class 11 Medical Biology Body Fluids And Circulation Quiz 12 - MCQExams.com

In the clotting mechanism pathway, thrombin activates the factors
  • XI, VIII, V
  • XI, IX, X
  • VIII, X, V
  • only XIII
Which proteolytic enzyme induces lysis of fibrin during fibrinolysis?
  • Fibrin
  • Thrombin
  • Plasmin
  • Platelet factor VIII
Rh factor was discovered by
  • Landsteiner and Weiner
  • William Harvey
  • Malpighi
  • None of these
Consider the following statements (A - C) each with one or two blanks.
(A)(1) are the most abundant cells (60-65 per cent) of the total WBCs and (2) are the least (0.5-1 per cent) among them.
(B)Platelets are cell fragments produced from (3).
(C)During clot formation, fibrins are formed by the conversion of inactive (4) in the plasma by the enzyme (5).
Which one of the following options, gives the correct fill ups for the respective blank numbers from (1) to (5) in the statements?
  • (l)-Neutrophils, (2)-basophiIs, (4)-fibrinogens, (5)-thrombin
  • (3)-mast cells, (4)-throm bo kinase, (5)prothrombin
  • (3)-megakaryocytes, (4) prothrombin, (5)thrombin
  • (1)-Basophils, (2)-neutrophils, (3)-reticulocytes
Which of the following statements is/are incorrect about lymph?
(i) Lymph is colourful as it has haemoglobin but no RBC.
(ii) It contains specialized lymphocytes which are responsible for the immunity of the body.
(iii) Lymph is an important carrier for nutrients and hormones.
(iv) Fats are absorbed through lymph in the lacteals present in the intestinal villi.
  • i only
  • iii and iv
  • ii and iii
  • iv only
In order for the blood to flow from right atrium to left ventricle in mammalian heart, it must flow through 
  • Right ventricle, pulmonary arteries, lungs , pulmonary veins, left atrium
  • Right ventricle, pulmonary veins, lungs , pulmonary anteries, left atrium
  • Right ventricle, right atrium, lungs , pulmonary veins, left atrium
  • Right ventricle, systemic aorta , lungs , pulmonary veins, left atrium
Which of the following statements are correct?

(i) $$Ca^{+2}$$ is necessary for blood coagulation.
(ii)Coagulation in blood vessel is prevented during normal condition by heparin.
(iii)Clotting of blood involves changes of fibrinogen to fibrin by thrombin.
(iv)Blood clotting involves cascading process involving a number of factors present always in the active form.
  • (i), (iii) and (iv)
  • (ii) and (iv)
  • (i)  and (iii)
  • (iii) and (iv)
Blood enters the heart because muscles of the
  • Atrium contracts
  • Atrium relaxes
  • Ventricle relaxes
  • Ventricle, contracts
Given below are four statements (i-iv) regarding human blood circulatory system.
i. Arteries are thick-walled and have narrow lumen as compared to veins.
ii. Angina is acute chest pain when the blood circulation to the brain is reduced.
iii. Persons with blood group AB can donate blood to. any person with any blood group under ABO system.
iv. Calcium ions play a very important role in blood clotting.
Which two of the above statements are correct?
  • i and iv
  • i and ii
  • ii and iii
  • iii and iv
Which one of the following is incorrect for 'atherosclerosis'?
  • Constriction of arterial lumen reduces the blood flow
  • Loss of dilation ability of the arterial wall and its rupture
  • Cholesterol deposition at the inner wall of the artery
  • None of these
In humans, blood passes from the vena cava to the diastolic right atrium of heart due to
  • Stimulation of the SA node
  • Pressure difference between the vena cava and the atrium
  • Pushing open of the venous valves
  • Suction pull
Select the correct option regarding the given figure:
  • D is eosinophil which is found more in asthma patients.
  • B is lymphocyte which helps in blood clotting.
  • C is neutrophil which is phagocytic in nature
  • A is monocyte which releases histamine, serotonin and heparin.
What is the nature of blood passing through blood vessels A, B, C and D respectively?
887493_8e24bcfd32e3476697edc7ae8d062540.png
  • A - Deoxygenated, B - Oxygenated, C - Deoxygenated, D - Oxygenated
  • A - Deoxygenated, B - Deoxygenated, C - Oxygenated, D - Oxygenated
  • A - Oxygenated, B - Oxygenated, C - Deoxygenated, D - Deoxygenated
  • A - Oxygenated, B - Deoxygenated, C - Oxygenated, D - Deoxygenated
Read the following statements carefully.
(i) In fishes the heart pumps out deoxygenated blood which is oxygenated by the gills and supplied to the body parts from where deoxygenated blood is returned to the heart.
(ii) The openings of the right and the left ventricles into pulmonary artery and aorta respectively are provided with the mitral valves.
(iii) The nodal musculature has the ability to generate action potentials without any external stimuli, i.e., it is autoexcitable.
(iv) The T-wave of ECG represents depolarisation of the ventricles.
Which of the above two statements are incorrect?
  • i and iii
  • ii and iv
  • i and ii
  • iii and iv
Which of the following options has the correct pair of nephron parts that maintain $$pH$$ and ionic balance of blood? 
  • Proximal convoluted tubule and collecting duct
  • Distal convoluted tubule and glomerulus
  • Proximal convoluted tubule and glomerulus
  • Collecting duct and Henle's loop
A red blood cell, entering the right side of the heart passes by or through the following structures. 
1. Atrioventricular valves
2. Semilunar valves
Right atrium
4.Right ventricle
SAN
Which of the following options represents the correct sequence?
  • 2 -> 3 -> 1 -> 4 -> 5
  • 3 -> 1->5->2->4
  • 3->5->1->4->2
  • 5->3->1->4->2
Mark the pair of substances among the following which is essential for coagulation of blood.
  • Heparin and calcium ions
  • Calcium ions and platelet factors
  • Oxalates and citrates
  • Platelet factors and heparin
The given figure shows diagrammatic representation of exchange of gases at the alveolus and the body tissues with blood and transport of oxygen and carbon dioxide. Identify the blood vessels A to D.
888555_b8fd7f8c96804c6a810f4cdaf24f6b99.JPG
  • A- Systemic vein, B- Pulmonary artery, C- Pulmonary vein, D- Systemic artery
  • A- Systemic artery, B- Pulmonary artery, C- Pulmonary vein, D- Systemic vein
  • A- Pulmonary artery, B- Systemic vein, C- Pulmonary vein, D- Systemic artery
  • A- Systemic vein, B- Pulmonary vein, C- Pulmonary artery, D- Systemic artery
Choose the correct answer from the alternatives given :
Which of the following statements is the most appropriate for sickle cell anaemia?
  • It cannot be treated with iron supplements
  • It is a molecular disease
  • It confers resistance to acquiring malaria
  • All of the above
One of the common symptoms observed in people infected with dengue fever is
  • Significant decrease in RBC count
  • Significant decrease in WBC count
  • Significant decrease in platelets count
  • Significant increase in platelets count
Who discovered the red blood corpuscles?
  • Georges Louis Buffon
  • Olof Rudbeck
  • Jan Swammerdam
  • Carolus Linnaeus
People living at sea level have around 5 million RBC per cubic millimetre of their blood whereas, those living at an altitude of 5400 metres have around 8 million. This is because at high altitude:
  • people eat more nutritive food so more RBCs are formed
  • people get pollution-free air to breathe and more oxygen is available
  • atmospheric oxygen level is less and hence, more RBCs are needed to absorb the required amount of oxygen to survive
  • there is more UV radiation which enhances RBC production
Which of the following carries glucose from digestive tract to liver?
  • Pulmonary vein
  • Hepatic portal vein
  • Hepatic artery
  • Data insufficient
Electrical activities of heart are measured by an instrument known as?
  • Electrocardiogram
  • Electrocardiograph
  • Electromyogram
  • Stethoscope
The diameter of human red blood cells is
  • 15 $$\mu \,m$$
  • 8.2 $$\mu \,m$$
  • 2 $$\mu \,m$$
  • 50 $$\mu \,m$$
Human blood grouping is called ABO instead of ABC because O signifies
  • No antigen
  • Overdominance
  • One antibody
  • Other antigen.
Cell organelle(s) not found in mature erythrocytes of many mammals is/are:
  • Mitochondria
  • Ribosomes
  • Nucleus
  • All of the above
Which of the following is/are true?
  • The red blood cells (RBCs) in an elephant are much bigger than those in a mouse.
  • There is no correlation between cell size and body size.
  • The red blood cells (RBCs) of an elephant and mouse will be of the same size
  • Both B and C
Which of the following is enucleated cell
  • RBC of frog
  • Sieve tube element
  • RBC of Crocodile
  • 1 and 2 both
Which of the following is the function of lymph?
  • Lymph carries digested and absorbed fat from the intestine.
  • Lymph drains excess fluid from extracellular space back into the blood.
  • Lymph maintains the volume of the blood.
  • All of the above
'Circulation of blood' in the body was discovered by
  • Jonas Salk
  • Robert Hooke
  • Joseph Lister
  • William Harvey
Consider the four entries below:
I. Right auricle
II. Left auricle
III. Right ventricle
IV. Left ventricle
The above are the four chambers of human heart in which the blood returned to the bean by great veins flows in a sequential order. What is the correct sequentional order?
  • II, IV, I, III
  • I, III, II, IV
  • I, II, III, IV
  • II, III, I, IV
Hemolymph is term used for the blood of the organism having
  • Water circulatory system
  • Closed circulatory system
  • Open circulatory system
  • Blood circulatory system
In a blood sample, a WBC has a nucleus with drum-sticks. This indicates that the blood sample has come from a person who is 
  • Heamphilic
  • Diabatic
  • Female
  • Sickle cell-anemic
Immunocomplexes are removed by 
  • Basophils and monocytes
  • Basophils and eosinophils
  • Eosinophils and monocytes
  • Neutrophils and basophils
The graph of the electrical activity of heart versus time produced by the non-invasive medical procedure is called
  • Electroencephalogram
  • Electrocardiogram
  • Stethoscope
  • None of the above
Hepatic portal system is found in
  • All mammals
  • All amniotes
  • All vertebrates
  • Higher invertebrates
  • None of these
At high altitude, Red blood cells 
  • Increase in number
  • increase in size
  • decrease in size
  • Decrease in the number
Choose the schematic diagram, which properly represents pulmonary circulation in human.
  • Right ventricle $$ \xrightarrow [blood]{Deoxygenated}$$ Lungs $$ \xrightarrow [blood]{Oxygenated}$$ Left auricle
  • Right ventricle $$ \xrightarrow [blood]{Oxygenated}$$ Lungs $$ \xrightarrow [blood]{Deoxygenated}$$ Left auricle
  • Left ventricle $$ \xrightarrow [blood]{Oxygenated}$$ Lungs $$ \xrightarrow [blood]{Deoxygenated}$$ Right ventricle
  • Left auricle $$ \xrightarrow [blood]{Oxygenated}$$ Lungs $$ \xrightarrow [blood]{Deoxygenated}$$ Right ventricle
How much oxygen, blood supplies to tissues in one circulation?
  • $$75\%$$
  • $$1.34\%$$
  • $$25\%$$
  • $$7\%$$
Closed type of circulatory system can be seen in 
  • Earthworm
  • Squids
  • Humans
  • All of the above
Read the following $$(A-D)$$:-
A. RBCs are the most abundant of all the cells in the blood.
B. A healthy adult man has an average of $$5$$ Billions to $$5.5$$ Billions of RBCs $$ /mm^{-3}$$ of blood.
C.RBCs are formed in the liver in adults.
D.RBCs are devoid of the nucleus in most mammals and are biconcave in shape.
How many of the above statements are incorrect?
  • $$4$$
  • $$3$$
  • $$2$$
  • $$1$$
The number of nucleus (nucleii) in matured mammalian erythrocytes is 
  • One
  • Many
  • Two
  • Nil
Lymph is
  • Blood minus R.B.C
  • Blood minus W.B.C
  • Blood minus cells
  • Plasma minus protein
Aerobic respiration cannot take place in which of the mammalian cell ?
  • WBC
  • RBC
  • nerve cell
  • liver cell
Human R.B.C.will swell up and burst when placed in the solution of?
  • $$0.7\%(w.v)$$
  • $$0.9\%(w.v)$$
  • $$1.2\%(w.v)$$
  • $$1.3\%(w.v)$$
If in ECG, P-R interval is lengthened, it shows
  • Artheroscleroptic plaque
  • Heart attack
  • Acute myocardial infraction
  • Both A & B
What would happen if a person was placed in water at $$15^o$$ C  over a short period of time in each of these areas ?
peripheral circulation Sweat glandsLiverSkeletal Muscle
1Increased blood flow Increased Secretion Decreased temperature Decreased 
shivering 
2Increased blood flow Decreased SecretionIncrease in temperature Increased 
shivering
3Decreased blood flow Increased SecretionNo change in temperature Increased 
shivering
4Decreased blood flow Decreased SecretionNo change in temperatureIncreased 
shivering
  • Option 1
  • Option 2
  • Option 3 
  • option 4
Which is the circulatory pathway of blood in the human heart?
  • Right auricle$$ \to $$ left auricle $$ \to $$ Lungs$$ \to $$Right ventricle $$ \to $$ Left ventricle
  • Right auricle$$ \to $$ Right ventricle $$ \to $$ Lungs$$ \to $$ left auricle $$ \to $$ Left ventricle
  • Lungs$$ \to $$ left auricle $$ \to $$ left ventricle$$ \to $$Right auricle $$ \to $$ Right ventricle
  • Left auricle$$ \to $$ left ventricle $$ \to $$ Lungs$$ \to $$Right auricle $$ \to $$ Right ventricle

In human beings, the membrane of erythrocyte has____________________
  • approximately $$40\%$$ proteins and $$52\%$$ lipids
  • cephalin on the outer side and lecithin on the inner side
  • approximately $$52\%$$ proteins and $$40\%$$ carbohydrates
  • lecithin on the outer side and cephalin on the inner side
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