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Body Fluids and Circulation — NEET UG Zoology PYQs

554 previous year questions from Body Fluids and Circulation with answers and solutions. Numbered list, year tags, and one-tap solutions — built for serious JEE / NEET practice.

554 questionsZoologySolutions on every page
1

The WBC count of a person's blood sample is 8000 /cu.mm. How many eosinophils and lymphocytes would be in the same blood sample approximately ?

NEET 2026 Solution View → 2

Which of the following statements is incorrect ?

NEET 2026 Solution View → 3

The opening between the right atrium and the right ventricle is guarded by __________.

NEET 2026 Solution View → 4

The number of action potentials generated by sino-arterial node (SAN) in a healthy human is __________ per minute.

NEET 2026 Solution View → 5

Select the incorrect statements with reference to Rh grouping : A. Erythroblastosis foetalis is a condition observed having foetus with Rh ^ -ve blood and mother with Rh ^ +ve bloo

NEET 2026 Solution View → 6

Cardiac activities of the heart are regulated by: A. Nodal tissue B. A special neural centre in the medulla oblongata C. Adrenal medullary hormones D. Adrenal cortical hormones Cho

NEET 2025 Solution View → 7

'Lub' sound of Heart is caused by the ______

NEET 2024 Solution View → 8

Following are the stages of pathway for conduction of an action potential through the heart A. AV bundle B. Purkinje fibres C. AV node D. Bundle branches E. SA node Choose the corr

NEET 2024 Solution View → 9

The mother has A + blood group the father has B + and the child is A + . What can be the possibility of genotypes of all three, respectively? A. I^A I^A |I^B i | I^B i B. I^A I^A |

NEET 2024 Solution View → 10

As per ABO blood grouping system, the blood group of father is B ⁺ , mother is A ⁺ and child is O ⁺ . Their respective genotype can be A. ^ B / / |^ A^A / / i i B. . I^ B |^ B / .

NEET 2024 Solution View → 11

A person with blood group ARh ⁻ can receive the blood transfusion from which of the following types? A. BRh ⁻ B. ABRh ⁻ C. ORh ⁻ D. ARh ⁻ E. ARh ^ * Choose the correct answer from

NEET 2024 Solution View → 12

Match List I with List II : array |l|l|l|l| & List I & & List II A. & P wave & I. & Heart muscles are electrically silent. B. & QRS complex & II. & Depolarisation of ventricles. C.

NEET 2024 Solution View → 13

Given below are two statements : Statement I : Bone marrow is the main lymphoid organ where all blood cells including lymphocytes are produced. Statement II : Both bone marrow and

NEET 2024 Solution View → 14

Match List-I with List-II Choose the correct answer from the options given below :

NEET 2023 Solution View → 15

Match List - I with List - II Choose the correct answer from the options given below :

NEET 2023 Solution View → 16

Match List I with List II . List I List II A. P-wave I. Beginning of systole B. Q-wave II. Repolarisation of ventricles C. QRS complex III. Depolarisation of atria D. T-wave IV. De

NEET 2023 Solution View → 17

Which of the following statements are correct? A. Basophils are most abundant cells of the WBCs B. Basophils secrete histamine, serotonin and heparin C. Basophils are involved in i

NEET 2023 Solution View → 18

Arrange the following formed elements in the decreasing order of their abundance in blood in humans : (a) Platelets (b) Neutrophils (c) Erythrocytes (d) Eosinophils (e) Monocytes C

NEET 2022 Solution View → 19

Given below are two statements: Statement I: The coagulum is formed of network of threads called thrombins. Statement II: Spleen is the graveyard of erythrocytes. In the light of t

NEET 2022 Solution View → 20

Which one of the following statements is correct?

NEET 2022 Solution View → 21

Which of the following animals has three chambered heart?

NEET 2022 Solution View → 22

Which enzyme is responsible for the conversion of inactive fibrinogens to fibrins?

NEET 2021 Solution View → 23

Persons with 'AB' blood group are called as "Universal recipients". This is due to:

NEET 2021 Solution View → 24

Which of the following conditions cause erythroblastosis foetalis?

NEET 2020 Solution View → 25

The QRS complex in a standard ECG represents:

NEET 2020 Solution View → 26

Which of the following is associated with decrease in cardiac output?

NEET 2020 Solution View → 27

Match the following columns and select the correct option. Column-I Column-II (a) Eosinophils (i) Immune response (b) Basophils (ii) Phagocytosis (c) Neutrophils (iii) Release hist

NEET 2020 Solution View → 28

The cation/anion responsible for blood clotting is

AIIMS 2019 Solution View → 29

Assertion : The cardiac output of an ordinary man and of an athlete is the same. Reason : It is impossible to alter the stroke volume as well as heart rate.

AIIMS 2019 Solution View → 30

Phagocytosis is shown by

AIIMS 2019 Solution View → 31

Assertion : SA node malfunctioning leads to disturbance of heart rate. Reason : SA node is the pacemaker of heart producing electric impulse for heart contraction.

AIIMS 2019 Solution View → 32

Chordae tendineae is found in

JIPMER 2019 Solution View → 33

Band 3 protein in RBC has the function of

JIPMER 2019 Solution View → 34

A specialised nodal tissue embedded in the lower corner of the right atrium, close to atrio-ventricular septum, delays the spreading of impulses to heart apex for about 0.1 sec . T

NEET 2019 Solution View → 35

All the components of the nodal tissue are autoexcitable. Why does the SA node act as the normal pacemaker?

NEET 2019 Solution View → 36

What would be the heart rate of a person if the cardiac output is 5 L, blood volume in the ventricles at the end of diastole is 100 mL and at the end of ventricular systole is 50 m

NEET 2019 Solution View → 37

Match the Column - I with Column - II: Column - I Column II a P - wave i Depolarisation of ventricles b QRS complex i i Repolarisation of ventricles c T - wave i i i Coronary ische

NEET 2019 Solution View → 38

What is diapedesis?

AIIMS 2018 Solution View → 39

The drugs used to quickly reduce the symptoms of allergy are

AIIMS 2018 Solution View → 40

Purkinje fibres are present in

AIIMS 2018 Solution View → 41

Purkinje's fibres are found in

JIPMER 2018 Solution View → 42

Match the items given in Column I with those in Column II and select the correct option given below: Column - I Column - II a. Fibrinogen i. Osmotic balance b. Globulin Ii. Blood c

NEET 2018 Solution View → 43

Match the items given in Column I with those in Column II and select the correct option given below: Column - I Column - II a. Tricuspid valve i. Between left atrium and left ventr

NEET 2018 Solution View → 44

Assertion: Pulmonary circulation consists of flow of deoxygenated blood from right ventricle to the lungs and flow of oxygenated blood from lungs to the left atrium. Reason: System

AIIMS 2017 Solution View → 45

An artificial pacemaker is implanted subcutaneously and connected to the heart in patients

AIIMS 2017 Solution View → 46

Intrinsic and extrinsic pathways of blood clotting are interlinked at the activation steps of which of the following factors?

JIPMER 2017 Solution View → 47

Adult human RBCs are enucleate. Which of the following statement(s) i s / a r e most appropriate explanation for this feature? (i) They do not need to reproduce (ii) They are somat

NEET 2017 Solution View → 48

The hepatic portal vein drains blood to the liver from

NEET 2017 Solution View → 49

Which of the following represents the action of insulin?

AIIMS 2016 Solution View → 50

The given figure shows schematic plan of blood circulation in humans with labels A to D. Identify the labels along with their functions and select the correct option.

AIIMS 2016 Solution View → 51

In cardiac cycle maximum time is taken by

JIPMER 2016 Solution View → 52

Name the blood cells, whose reduction in number can cause clotting disorder, leading to excessive loss of blood from the body.

NEET 2016 Solution View → 53

Blood pressure in the pulmonary artery is:

NEET 2016 Solution View → 54

Serum differs from blood in

NEET 2016 Solution View → 55

When kidney of a person is damaged, he/she invariably suffers from anaemia because

AIIMS 2015 Solution View → 56

A small rise in the body temperature of humans is corrected by (i) sweating (ii) dilating the skin arteries (iii) constricting the skin arteries (iv) increased tension of muscles i

AIIMS 2015 Solution View → 57

Assertion : ADH and RAAS work in response to low blood volume and blood pressure. Reason : ANF works in response to high blood volume and blood pressure.

AIIMS 2015 Solution View → 58

Mature RBCs lose their ability for

AIIMS 2015 Solution View → 59

If you suspect major deficiency of antibodies in a person, to which of the following would you like for confirmation evidence?

NEET 2015 Solution View → 60

Blood pressure in the mammalian aorta is maximum during

NEET 2015 Solution View → 61

Which one of the following is correct?

NEET 2015 Solution View → 62

Doctors use a stethoscope to hear the sounds produced during each cardiac cycle. The second sound is heard when:

NEET 2015 Solution View → 63

Which one of the following animals has two separate circulatory pathways?

NEET 2015 Solution View → 64

In a standard ECG which one of the following alphabets is the correct representation of the respective activity of the human heart?

AIIMS 2014 Solution View → 65

Assertion : Human heart is myogenic. Reason: The contraction is initiated by a specialized patch of modified heart muscles without requiring stimulation from nerve cells.

AIIMS 2014 Solution View → 66

Identify the given figure and select the correct option.

AIIMS 2014 Solution View → 67

Assertion : Pulmonary circulation consists of flow of deoxygenated blood from right ventricle to the lungs and flow of oxygenated blood from lungs to the left atrium. Reason: Syste

AIIMS 2014 Solution View → 68

Assertion : The enlarged Q and R waves indicate myocardial infarction. Reason: The QRS complex represents ventricular repolarisation.

AIIMS 2014 Solution View → 69

If due to some injury the chordae tendinae of the tricuspid valve of the human heart is partially non-functional, what will be the immediate effect?

JIPMER 2014 Solution View → 70

Person with blood group AB is considered as universal recipient because he has:

NEET 2014 Solution View → 71

How do parasympathetic neural signals affect the working of the heart?

NEET 2014 Solution View → 72

Select the option having all the correct characteristics.

AIIMS 2013 Solution View → 73

Assertion : On touching radial artery in our wrist, we feel pulse waves. Reason : The heart beats originate from the sinoatrial node (SA node) on the right atrium.

AIIMS 2013 Solution View → 74

The figure shows a human blood cell. Identify it and give its characteristics.

NEET 2013 Solution View → 75

Figure shows schematic plan of blood circulation in human with labels A to D. Identify the label and give its function/s

NEET 2013 Solution View → 76

The diagram given here is the standard ECG of a normal person. The P-wave represents the

NEET 2013 Solution View → 77

The figure shows blood circulation in humans with labels a to b. Select the option which gives correct identification of label and functions of the part.

NEET 2013 Solution View → 78

Ventricular diastole occurs due to a/an

AIIMS 2012 Solution View → 79

Select the option having all the correct characteristics.

AIIMS 2012 Solution View → 80

A patient brought to a hospital with myocardial infarction is normally immediately given

NEET 2012 Solution View → 81

People who have migrated from the planes to an area adjoining Rohtang Pass about six months back

NEET 2012 Solution View → 82

Which one of the following human organs is often called the 'graveyard' of RBCs?

NEET 2012 Solution View → 83

A certain road accident patient with unknown blood group needs immediate blood transfusion. His one doctor friend at once offers his blood. What was the blood group of the donor?

NEET 2012 Solution View → 84

Which of the following is an incorrect statement?

AIIMS 2011 Solution View → 85

Assertion : Blood group ' O ' have anti-A & antiB antibodies. Reason : It does not have any antigens.

AIIMS 2011 Solution View → 86

The opening between the right atrium and the right ventricle is guarded by the valve named

AIIMS 2011 Solution View → 87

Assertion: S.A. node induces excitatory impulses in heart. Reason : S.A. node is self excitatory.

AIIMS 2011 Solution View → 88

Arteries are best defined as the vessels which

NEET 2011 Solution View → 89

'Bundle of His' is a part of which one of the following organs in humans?

NEET 2011 Solution View → 90

Which one of the following statements is correct regarding blood pressure?

NEET 2011 Solution View → 91

What are those structures that appear as 'beads-on-string' in the chromosomes when viewed under electron microscope?

NEET 2011 Solution View → 92

Bulk of carbon dioxide ( CO ₂ ) released from body tissues into the blood is present as

NEET 2011 Solution View → 93

Given below is the ECG of a normal human. Which one of its components is human, which one of its components is correctly interpreted below.

NEET 2011 Solution View → 94

Which one of the following plasma proteins is involved in the coagulation of blood?

NEET 2011 Solution View → 95

Which one is correct regarding electrocardiograph (ECG)?

AIIMS 2010 Solution View → 96

Fastest distribution of some injectible material/medicine and with no risk of any kind can be achieved by injecting it into the

NEET 2010 Solution View → 97

Given below are four statements (A-D) regarding human blood circulatory system A. Arteries are thick-walled and have narrow lumen as compared to veins. B. Angina is acute chest pai

NEET 2010 Solution View → 98

The haemoglobin content per 100 ~mL of blood of a normal healthy human adult is

NEET 2010 Solution View → 99

What is true about RBCs in humans?

NEET 2010 Solution View → 100

If due to some injury the chordae tendinae of the tricuspid valve of the human heart is partially non-functional, what will be the immediate effect?

NEET 2010 Solution View → 101

Assertion : Angina pectoris means "pain in the chest". Reason : It results due to carrying of extra blood to the heart muscle.

AIIMS 2009 Solution View → 102

What is diapedesis?

AIIMS 2009 Solution View → 103

In a standard ECG, which one of the following alphabets is the correct representation of the respective activity of the human heart?

NEET 2009 Solution View → 104

Compared to blood our lymph has

NEET 2009 Solution View → 105

The most popularly known blood grouping is the ABO grouping. It is named ABO and not A B C , because ' O ' in it refers to having

NEET 2009 Solution View → 106

Globulins contained in human blood plasma are primarily involved in

NEET 2009 Solution View → 107

In a standard ECG which one of the following alphabets is the correct represention of the respective activity of the human heart?

NEET 2009 Solution View → 108

The most popularly known blood grouping is the ABO grouping. It is named ABO and not ABC , because "O" in it refers to having :

NEET 2009 Solution View → 109

Compared to blood our lymph has :

NEET 2009 Solution View → 110

There is no DNA in :

NEET 2009 Solution View → 111

Globulins contained in human blood plasma are primarily involved in -

NEET 2009 Solution View → 112

You are required to draw blood from a patient and to keep it in a test tube for analysis of blood corpuscles and plasma. You are also provided with the following four types of test

AIIMS 2008 Solution View → 113

Cattle fed with spoilt hay of sweet clover which contains dicumarol

AIIMS 2008 Solution View → 114

Which one of the following is a matching pair?

AIIMS 2008 Solution View → 115

Which type of white blood cells are concerned with the release of histamine and the natural anticoagulant heparin?

NEET 2008 Solution View → 116

The most active phagocytic white blood cells are

NEET 2008 Solution View → 117

In humans, blood passes from the post caval to the diastolic right atrium of heart due to

NEET 2008 Solution View → 118

Which type of white blood cells are concerned with the release of histamine and the natural anticoagulant heparin?

NEET 2008 Solution View → 119

The most active phagocytic white blood cells are

NEET 2008 Solution View → 120

Consider the following statements about biomedical technologies A. During open heart surgery blood is circulated in the heart-lung machine. B. Blockage in coronary arteries is remo

NEET 2008 Solution View →
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