Body Fluids & Circulation PYQs Set 1 (PDF)

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Mere Teacher · Previous Year Questions NEET Biology · Body Fluids & Circulation · Set 1 (Q1-30)
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1. $Persons with 'AB' blood group are called as "Universal recipients". This is due to :$ (1) $Absence of antigens A and B on the surface of RBCs$ (2) $Absence of antigens A and B in plasma$ (3) $Presence of antibodies, anti-A and anti-B, on RBCs$ (4) $Absence of antibodies, anti-A and anti-B, in plasma$ 2. $Which one of the following statements is correct?$ (1) $Increased ventricular pressure causes closing of the semilunar valves$ (2) $The atrio-ventricular node (AVN) generates an action potential to stimulate atrial contraction$ (3) $The tricuspid and the bicuspid valves open due to the pressure exerted by the simultaneous contraction of the atria$ (4) $Blood moves freely from atrium to the ventricle during joint diastole.$ 3. $Arteries are best defined as the vessels which:$ (1) $Carry blood away from the heart to different organs.$ (2) $Break up into capillaries which reunite to form a vein.$ (3) $Carry blood from one visceral organ to another visceral organ.$ (4) $Supply oxygenated blood to different organs.$ 4. $The letter T in T-lymphocyte refers to :-$ (1) $Thymus$ (2) $Thyroid$ (3) $Thalamus$ (4) $Tonsil$ 5. $Which one of the following plasma proteins is involved in the coagulation of blood?$ (1) $Serum amylase$ (2) $A globulin$ (3) $Fibrinogen$ (4) $An albumin$ 6. $Which one of the following statements is correct regarding blood pressure?$ (1) $100/55 mmHg is considered as an ideal blood pressure.$ (2) $105/50 mmHg makes one very active.$ (3) $190/110 mmHg may harm vital organs like brain and kidney.$ (4) $130/90 mmHg is considered high and requires treatment.$ 7. $In humans, blood passes from the post caval to the diastolic right atrium of heart due to :-$ (1) $stimulation of the sino auricular node$ (2) $pressure difference between the post caval and atrium$ (3) $pushing open of the venous valves$ (4) $suction pull$ 8. $Which type of white blood cells are concerned with the release of histamine and the natural anticoagulant heparin?$ (1) $Eosinophils$ (2) $Monocytes$ (3) $Neutrophils$ (4) $Basophils$ 9. $Person with blood group AB is considered as universal recipient because he has$ (1) $Both A and B antigens on RBC but no antibodies in the plasma.$ (2) $Both A and B antibodies are in the plasma.$ (3) $No antigen on RBC and no antibody in the plasma.$ (4) $Both A and B antigens in the plasma but no antibodies.$ 10. $Blood pressure in the pulmonary artery is :-$ (1) $same as that in the aorta.$ (2) $more than that in the carotid.$ (3) $more than that in the pulmonary vein.$ (4) $less than that in the venae cavae.$ 11. $Blood pressure in the pulmonary artery is:$ (1) $same as that in the aorta$ (2) $more than that in the carotid$ (3) $more than that in the pulmonary vein$ (4) $less than that in the vena cavae$ 12. $Which one of the following animals has two separate circulatory pathways?$ (1) $Lizard$ (2) $Whale$ (3) $Shark$ (4) $Frog$ 13. $‘Bundle of His’ is a part of which one of the following organs in humans?$ (1) $Heart$ (2) $Kidney$ (3) $Pancreas$ (4) $Brain$ 14. $Blood pressure in the mammalian aorta is maximum during:$ (1) $Systole of the left atrium$ (2) $Diastole of the right ventricle$ (3) $Systole of the left ventricle$ (4) $Diastole of the right atrium$ 15. $Name the blood cells, whose reduction in number can cause clotting disorder, leading to excessive loss of blood from the body.$ (1) $Leucocytes$ (2) $Neutrophils$ (3) $Thrombocytes$ (4) $Erythrocytes$ 16. $Which of the following conditions cause erythroblastosis foetalis?$ (1) $Mother R h^{+ v e} and foetus R h^{- v e}$ (2) $Mother R h^{- v e} and foetus R h^{+ v e}$ (3) $Both mother and foetus R h^{- v e}$ (4) $Both mother and foetus R h^{+ v e}$ 17. $Examination of blood of a person suspected of having anemia, shows large, immature, nucleated erythrocytes without haemoglobin. Supplementing his diet with which of the following is likely to alleviate his symptoms?$ (1) $Thiamine$ (2) $Folic acid and cobalamine$ (3) $Riboflavin$ (4) $Iron compounds$ 18. $Doctors use stethoscope to hear the sounds produced during each cardiac cycle. The second sound is heard when:$ (1) $Ventricular walls vibrate due to gushing in of blood from atria$ (2) $Semilunar valves close down after the blood flows into vessels from ventricles$ (3) $AV node receives signal from SA node$ (4) $AV valves open up$ 19. $A unique vascular connection between the digestive tract and liver is called ________ .$ (1) $Hepato-pancreatic system$ (2) $Hepatic portal system$ (3) $Renal portal system$ (4) $Hepato-cystic system$ 20. $The hepatic portal vein drains blood to liver from :$ (1) $Stomach$ (2) $Kidneys$ (3) $Intestine$ (4) $Heart$ 21. $The most active phagocytic white blood cells are:-$ (1) $Eosinophils and lymphocytes$ (2) $Neutrophils and monocytes$ (3) $Neutrophils and eosinophils$ (4) $Lymphocytes and macrophages$ 22. $Which of the following conditions cause erythroblastosis foetalis?$ (1) $Mother Rh^{- vc} and foetus Rh^{+ ve}$ (2) $Both mother and foetus Rh - ve$ (3) $Both mother and foetus Rh + ve$ (4) $Mother Rh^{+ ve} and foetus Rh^{- ve}$ 23. $What would be the heart rate of a person if the cardiac output is 5 L , blood volume in the ventricles at the end of diastole is 100 mL and at the end of ventricular systole is 50 mL ?$ (1) $50 beats per minute$ (2) $75 beats per minute$ (3) $100 beats per minute$ (4) $125 beats per minute$ 24. $Inadequate supply of oxygen to heart muscles leads to a symptom of acute chest pain. This disorder of the circulatory system is identified as:$ (1) $Cardiac arrest$ (2) $Heart failure$ (3) $Coronary Heart Disease$ (4) $Angina pectoris$ 25. $The most popularly known blood grouping is the ABO grouping. It is named ABO and not ABC, because "O" in it refers to having:-$ (1) $No antigens A and B on RBCs$ (2) $Other antigens besides A and B on RBCs$ (3) $Over dominance of this type on the genes for A and B types$ (4) $One antibody only - either anti-A or anti-B on the RBCs$ 26. $A certain road accident with unknown blood group needs immediate blood transfusion. His one doctor friend at once offers his blood. What was the blood group of the donor?$ (1) $Blood group B$ (2) $Blood group AB$ (3) $Blood group O$ (4) $Blood group A$ 27. $Which enzyme is responsible for the conversion of inactive fibrinogens to fibrins?$ (1) $Thrombin$ (2) $Renin$ (3) $Epinephrine$ (4) $Thrombokinase$ 28. $All the components of the nodal tissue are auto excitable. Why does the SA node act as the normal pacemakar?$ (1) $SA node has the lowest rate of depolarisation.$ (2) $SA node is the only component to generate the threshold potential.$ (3) $Only SA node can convey the action potential to the other components.$ (4) $SA node has the highest rate of depolarisation.$ 29. $The haemoglobin content per 100 ml of blood of a normal healthy human adult is$ (1) $5 - 11 mg$ (2) $25 - 30 mg$ (3) $17 - 20 mg$ (4) $12 - 16 mg$ 30. $Match the Column-I with Column-II Column-I A. P - wave B. QRS complex C. T - wave D. Reduction in the size of T-wave Column-II (i) Depolarisation of ventricles (ii) Repolarisation of ventricle (iii) Coronary ischemia (iv) Depolarisation of atria (v) Repolarisation of atria Select the correct option.$ (1) $A-(iv), B-(i), C-(ii), D-(iii)$ (2) $A-(iv), B-(i), C-(ii), D-(v)$ (3) $A-(ii), B-(i), C-(v), D-(iii)$ (4) $A-(ii), B-(iii), C-(v), D-(iv)$