Circulatory System Questions and Answers test 1

Mdcat Biology XI Circulatory system Test 1

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Test Details:

Subject: Biology
Class: 1st year or 11
Chapter name: Circulatory System
Test: MDCAT 2023
Book: Sindh Textbook
Total No. Of MCQS: 50
Time Allowed: 50 Minutes
Price : Free

264

Created on July 17, 2023 By

medicoengineer.com

Mdcat Biology XI Circulatory / Transport Mcqs test 1

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NameEmailPhone Number

1 / 50

1. Left atrium receives oxygenated blood from

a) right atrium

b) lungs

c) right ventricle

d) right atria

2 / 50

2. Mitral valve is present between __________

a) right atrium and left ventricle

b) right and left ventricle

c) left ventricle and aorta

d) left atrium and left ventricle

3 / 50

3. The opening of right atrium into right ventricle is guarded by _______

a) mitral valve

b) tricuspid valve

c) bicuspid valve

d) aortic semilunar valve

4 / 50

4. SA node is located in _____

a) upper lateral wall of right atrium

b) lower lateral wall of left atrium

c) lower lateral wall of right atrium

d) upper lateral wall of left atrium

5 / 50

5. Which of the following has the thickest wall?

a) Right ventricle

b) Left ventricle

c) Right atrium

d) Left atrium

6 / 50

6. Papillary muscles contract:

a) When right ventricle contracts

b) When left ventricle contracts

c) When both right and left atria contract

d) Both A and B

7 / 50

7. What is/are common component(s) of both capillaries and arteries?

I) Elastic fibres II) Smooth Muscles III) Endothelium

a) I only

b) II only

c) III only

d) I, II and III

8 / 50

8. The type of blood vessels that provide direct approach to cell in the body are:

a) Capillaries

b) Arteries

c) Arterioles

d) B and C

9 / 50

9. Pericardium covers heart as it is.

a) Opened sac

b) Closed sac

c) Closed tube

d) Opened cone

10 / 50

10. When heart is beating, friction between heart wall and surrounding tissues is reduced by:

a) Pleural fluid

b) Pericardial fluid

c) Lymph

d) Interstitial fluid

11 / 50

11. Right ventricle of human heart opens into:

a) Pulmonary vein

b) Superior & inferior venae cavae

c) Systemic aorta

d) None of these

12 / 50

12. The blood vessels that generally carry oxygenated blood are:

a) Capillaries

b) Arteries

c) Venules

d) Veins

13 / 50

13. Which type of blood vessel(s) contain(s) valves?

a) Artery

b) Vein

c) Capillary

d) Lymph vessel

14 / 50

14. When the two upper chambers of human heart contract:

a) Ventricles contract

b) Semilunar valves: open

c) AV valves: open

d) All of these

15 / 50

15. Tunica intima of veins is composed of

a) Endothelial cells

b) Elastic fibres and Smooth muscle

c) Collagen fires

d) A and B

16 / 50

16. In human heart, the heartbeat is begun in:

a) Right ventricle

b) Left ventricle

c) Right atrium

d) Left atrium

17 / 50

17. Coronary sinus receives:

a) Oxygen-rich blood

b) Oxygenated blood

c) Venous blood

d) None of these

18 / 50

18. In human heart, atrioventricular valve between left atrium and left ventricle:

a) Has two flaps and called bicuspid valve

b) Has two flaps and called mitral valve

c) Has three flaps and called tricuspid valve

d) Either A or B

19 / 50

19. Find the right statement about thickness of walls of heart chambers.

a) Atria are thicker than ventricles.

b) Right atrium is thicker than right ventricle

c) left atrium is thicker than right ventricle.

d) Left ventricle is thicker than right ventricle.

20 / 50

20. Generally called as pace maker of heart:

a) AV Node

b) Bundle of His

c) SA Node

d) Purkinji fibres

21 / 50

21. Valves prevent backflow of blood; valves are typically present in:

a) Capillaries

b) Arteries

c) Arterioles

d) Veins

22 / 50

22. Find the right choice for the right series of path of blood through heart.

a) Right atrium →Right ventricle →Systemic aorta → Body systems

b) Left atrium →Left ventricle → Pulmonary aorta → Lungs

c) Right atrium →Right ventricle → Pulmonary aorta → Body systems

d) Left atrium →Left ventricle → Systemic aorta → Body systems

23 / 50

23. Oxygen-poor blood that has returned from the body:

a) Enters into left atrium

b) Enters into pulmonary veins

c) Enters systemic aorta

d) Enters into right atrium

24 / 50

24. All of the following events happen in right ventricle during its contraction except:

I) The tricuspid valve closes.

II) Oxygen-poor blood transported into the lungs to be oxygenated.

III) The blood is pumped through the pulmonary valve into the pulmonary arteries.

IV) Oxygen-rich blood transported into the lungs to be oxygenated.

a) III only

b) IV only

c) I and III

d) II and IVII and IVII and IV

25 / 50

25. The pulmonary valve regulates the:

a) Oxygenated blood from the right ventricle to the lungs for oxygenation.

b) Deoxygenated blood from the right ventricle to the lungs for oxygenation.

c) Oxygenated blood from the left ventricle to the lungs for oxygenation.

d) Deoxygenated blood from the left ventricle to the lungs for oxygenation.

26 / 50

26. The heart muscles rest:

a) 0.7 to 0.8 seconds between beats

b) 0.5 to 0.7 seconds between beats

c) 0.3 to 0.5 seconds between beats

d) 0.1 to 0.3 seconds between beats

27 / 50

27. What is untrue about ventricular contraction?

a) The tricuspid and mitral valve open to allow blood flow into the respective ventricles

b) Blood from the left ventricle is pumped to the rest of the body through the aorta

c) Blood from the right ventricle is pumped to the lungs through the pulmonary Artery

d) Both B and C

28 / 50

28. Identify the phase of cardiac cycle with following characteristic features.

I) Semilunar valves: open II) High pressure in ventricles III) AV valves: close

a) Complete cardiac diastole

b) Ventricular diastole

c) Atrial systole

d) Ventricular systole

29 / 50

29. Arteries are a type of blood vessels; and they branch into:

a) Capillaries

b) Venules

c) Arterioles

d) Arterioles and capillaries

30 / 50

30. Right atrium is a chamber of heart and it receives:

a) Coronary sinus

b) Superior vena cava

c) Inferior vena cava

d) A, B and C

31 / 50

31. Human heart is „double pump‟ because:

a) Right atrium pumps blood into right ventricle.

b) Left ventricle sends blood throughout the body.

c) Right ventricle sends blood to the lungs.

d) Both B and C

32 / 50

32. Blood enters the right atrium from the body through the venae cavae in:

a) Atrial systole

b) Ventricular diastole

c) Atrial diastole

d) A and B

33 / 50

33. Human heart has 4 chambers; the lower two chambers are called ?

a) Ventical

b) Artia

c) SA node

d) Cone

34 / 50

34. The specialized group of cardiac cells responsible for starting action potential throughout the heart:

a) Sinus venosus

b) Valves

c) sinoatrial (SA) node,

d) All of these

35 / 50

35. The two ventricles of human heart are separated by:

a) AV valves

b) SL valves

c) Interatrial septum

d) Interventricular septum

36 / 50

36. The smooth outer surface of the heart chambers is nature of:

a) Endocardium

b) Myocardium

c) Epicardium

d) Fibrous tissues

37 / 50

37. Bicuspid valve and tricuspid valve remain open during which phase of cardiac cycle?

a) Ventricular systole

b) Ventricular diastole

c) Atrial systole

d) Both B and C

38 / 50

38. The heart chamber that produces the highest pressure in the blood is:

a) Left ventricle

b) Right atrium

c) Left atrium

d) B and C

39 / 50

39. What is/are untrue statement(s) about ventricular diastole?

I) Mitral and tricuspid valves open.

II) Oxygen rich blood from the left atrium flows to the left ventricle

III) Mitral and tricuspid valves close.

a) I only

b) III only

c) I and II

d) II and III

40 / 50

40. Find the right statement about tricuspid valve.

I. It prevents backflow of blood from right ventricle to right atrium.

II. It prevents backflow of blood from right atrium to right ventricle.

III. It prevents backflow of blood from left atrium to left ventricle.

a) I only

b) II only

c) III only

d) II and III

41 / 50

41. The right ventricle of human heart sends blood into pulmonary trunk:

a) Through pulmonary semilunar valve

b) Through bicuspid valve

c) Through aortic semilunar valve

d) Through tricuspid valve

42 / 50

42. Capillary wall consists of:

a) Elastic fibres

b) Smooth muscles

c) Endothelial cells

d) Collagen fibres

43 / 50

43. Blood passes into which chamber of heart, after crossing the mitral valve?

a) Left ventricle

b) Systemic aorta

c) Right ventricle

d) Pulmonary aorta

44 / 50

44. What is duration of normal cardiac cycle?

a) 0.7 to 0.8 seconds

b) 0.5 to 0.7 seconds

c) 0.3 to 0.5 seconds

d) 0.1 to 0.3 seconds

45 / 50

45. Coronary sinus receives:

a) Blood from right atrium

b) Blood from lungs

c) Blood from head

d) Blood from myocardium

46 / 50

46. Find the correct order about systemic circulation?

a) Right ventricle → Aorta →body systems

b) Left ventricle →Pulmonary artery→ Lungs

c) Left ventricle→ Aorta→body systems

d) Right ventricle →Pulmonary artery→ Lungs

47 / 50

47. Left atrium of human heart receives:

a) 2 pulmonary veins

b) 2 pulmonary arteries

c) 4 pulmonary veins

d) 4 pulmonary arteries

48 / 50

48. Situation: The chordae tendinae attached to mitral valve are damaged. What would be the Result/Effect?

a) Blood might flow back through tricuspid valve

b) Blood might flow back through aortic valve

c) Blood might flow back through mitral valve

d) Blood might flow back through pulmonary valve

49 / 50

49. The heart valves are formed by:

a) A fold of endocardium

b) A fold of myocardium

c) A fold of epicardium

d) A fold of white fibrous tissues

50 / 50

50. What is true about pericardium?

a) Composed of three layers of tissues

b) Outer part consists of white inelastic fibrous connective tissue

c) Inner part consists of white elastic fibrous connective tissue

d) A, B and C are true.

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The average score is 63%

Instructions for Chapter Circulatory System Online Test Mdcat-2023:

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