Circulatory System MCQs and Answers with FREE PDF

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1. RBCs do not occur in

(a) frog

(b) cow

(c) camel

(d) cockroach.

2. Breakdown product of haemoglobin is

(a) bilirubin

(b) iron

(c) biliverdin

(d) calcium.

3. Child death may occur in the marriage of

(a) Rh+ man and Rh’ woman

(b) Rh man and Rli woman

(c) Rh man and Rh woman

(d) Rh man and Rh’ woman.

4. Presence of RBC in urine is

(a) alkaptonuria

(b) urothiasis

(c) hematuria

(d) proteinuria.

5. Sickle cell disease is characterised by

(a) leukemia

(b) polycythemia

(c) mental retardation

(d) hemolytic anaemia.

6. Haemophilia is

(a) royal disease

(b) faulty blood clotting

(c) both a and b

(d) mosquito having haemocoel.

7. Which one engulfs pathogens rapidly?

(a) acidophils

(b) monocytes

(c) basophils

(d) neutrophils.

8. Tricuspid valve is found in between

(a) sinus venosus and right auricle

(b) right auricle and right ventricle

(c) left ventricle and left auricle

(d) ventricle and aorta.

9. A person with blood group A requires blood. The blood group which can be given is

(a) A and B

(b) A and AB

(c) A and O

(d) A, B, AB and O.

10. Removal of calcium from freshly collected blood would

(a) cause delayed clotting

(b) prevent clotting

(c) cause immediate clotting

(d) prevent destruction of haemoglobin.

11. Arteries carry oxygenated blood except

(a) pulmonary

(b) cardiac

(c) hepatic

(d) systemic.

12. A vein possesses a large lumen because

(a) tunica media and tunica externa form a single coat

(b) tunica interna and tunica media form a single coat

(c) tunica interna, tunica nicuiu and tunica externa are thin

(d) tunica media is a thin coat.

13. Splenic artery arises from

(a) anterior mesenteric artery

(b) coeliac artery

(c) posterior mesenteric artery

(d) intestinal artery.

14. Wall of blood capillary is formed of

(a) haemocytes

(b) parietal cells

(c) endothelial cells

(d) oxyntic cells.

15. Carbonic anhydrase occurs in

(a) lymphocytes

(b) blood plasma

(c) RBC

(d) leucocytes.

16. Blood group AB has

(a) no antigen

(b) no antibody

(c) neither antigen nor antibody

(d) both antigen and antibody.

18. Cells formed in bone marrow include

(a) RBC

(b) RBC and leucocytes

(c) leucocytes

(d) lymphocytes.

19. Blood capillaries are made of

(a) endothelium, connective tissue and muscle fibres

(b) endothelium and muscle fibres

(c) endothelium and connective tissue

(d) endothelium only.

20. Cells involved in immune mechanism are

(a) erythrocytes

(b) lymphocytes

(c) eosinophils

(d) thrombocytes.

21. The pace setter in the heart is called

(a) sino-atrial node (SAN)

(b) atrio-ventricular node (AVN)

(c) Purkinje fibres

(d) papillary muscle.

22. The heart sound dup is produced when

(a) mitral valve is closed

(b) semi-lunar valves at the base of aorta get closed

(c) tricuspid valve is opened

(d) mitral valve is opened.

23. HIV that causes AIDS first starts destroying

(a) helper T-lymphocytes

(b) B-lymphocytes

(c) leucocytes

(d) thrombocytes.

24. Lysozyme that is present in perspiration, saliva and tears, destroys

(a) certain types of bacteria

(b) all viruses

(c) most virus-infected cells

(d) certain fungi

52. Antibodies in our body are complex

(a) glycoproteins

(b) lipoproteins

(c) steroids

(d) prostaglandins

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