Home/MDCAT/MDCAT Biology Circulation Online Test

MDCAT Biology Circulation Online Test

Mustansar KhanLast Updated: June 14, 2025

MDCAT Biology Circulation Test

MDCAT Biology Circulation Chaper 11 Online Test

Total Questions:	49
Time Allowed:	25 Minutes
Total Marks:	49
How to Attempt Test:	Please choose the right Option in MCQ-type question.
Test Helpful For:	MDCAT Entry Test Biology Online Test Interview Questions about Biology All Universities Entrance Test Recruitments Tests

MDCAT Biology Circulation MCQS Online Test

Please wait...

Page 1 of 2

Uncategorized

1. Which part of the heart receives blood from the lungs?

Left atrium

Left ventricle

Right ventricle

Right atrium

2. What initiates the heartbeat in the human heart?

Bundle of His

SA node

Purkinje fibers

AV node

3. Which blood vessel returns blood from the upper body to the heart?

Aorta

Superior vena cava

Inferior vena cava

Pulmonary vein

4. Which component of blood is primarily involved in clotting?

Red blood cells

White blood cells

Plasma

Platelets

5. Which part of the heart receives blood from the vena cava?

Left atrium

Right ventricle

Right atrium

Left ventricle

6. Which of the following returns lymph to the bloodstream?

Thoracic duct

Aorta

Renal vein

Capillary

7. What occurs during diastole?

Valves close

Heart muscles contract

Heart muscles relax and chambers fill with blood

Blood is expelled from the heart

8. Which blood vessel carries oxygenated blood under high pressure?

Arteries

Capillaries

Lymph vessels

Veins

9. Which of the following arteries supplies blood to the heart muscle?

Coronary artery

Pulmonary artery

Carotid artery

Renal artery

10. Which part of the heart pumps oxygenated blood to the entire body?

Right ventricle

Left atrium

Left ventricle

Right atrium

11. Which type of blood vessel usually carries blood under low pressure?

Capillaries

Veins

Arteries

Arterioles

12. What causes lymph to move in the body?

Muscle movement and valve action

High lymph pressure

Pumping of lymph nodes

Gravity

13. What causes the “lub-dub” sound of the heartbeat?

Closing of heart valves

Blood entering the atria

Contraction of heart muscles

Opening of heart valves

14. Which part of the nervous system regulates heart rate?

Peripheral nervous system

Somatic nervous system

Central nervous system

Autonomic nervous system

15. The process of moving lymph through lymph vessels is mainly aided by:

Arterial pressure

Heartbeat

Muscle contraction

Gravity

16. Which organ is primarily responsible for producing lymphocytes?

Liver

Spleen

Pancreas

Kidney

17. What is the average duration of the cardiac cycle?

0.2 seconds

0.8 second

2.0 seconds

1.0 second

18. Which of these is the main component of lymph?

Water and proteins

Plasma

White blood cells

Red blood cells

19. Which of the following is NOT a function of the lymphatic system?

Drainage of tissue fluid

Absorption of fats

Immunity

Transportation of oxygen

20. Which blood vessel has the smallest diameter?

Capillary

Artery

Vein

Venule

21. Which structure ensures one-way flow of blood in the heart?

Myocardium

Septum

Arteries

Valves

22. Which chamber of the human heart receives oxygen-poor blood from the body?

Left ventricle

Left atrium

Right ventricle

Right atrium

23. What does the lymphatic system transport from the small intestine?

Fats

Water

Amino acids

Glucose

24. What is the function of capillaries in tissues?

Exchange nutrients and gases

Store blood

Prevent infection

Maintain blood pressure

25. The structure responsible for initiating the heartbeat is:

SA node

AV node

Bundle of His

Vagus nerve

Page 2 of 2

26. Which side of the heart receives blood from the body?

Neither

Both sides

Right side

Left side

27. Which valve is located between the left atrium and left ventricle?

Tricuspid valve

Aortic valve

Pulmonary valve

Bicuspid (mitral) valve

28. Which vessel in the lymphatic system collects lymph from the lower body?

Right lymphatic duct

Jugular vein

Thoracic duct

Subclavian artery

29. What type of blood do pulmonary arteries carry?

Oxygenated

Filtered

Mixed

Deoxygenated

30. Which component conducts electrical impulses from atria to ventricles?

Aortic valve

SA node

Purkinje fibers

AV node

31. Which valve prevents the backflow of blood from the right ventricle to the right atrium?

Bicuspid valve

Aortic valve

Pulmonary valve

Tricuspid valve

32. Arteries are characterized by:

Slow blood flow

Thin walls and valves

Carrying blood toward the heart

Thick muscular walls and high pressure

33. Which type of circulation moves blood between the heart and lungs?

Pulmonary circulation

Systemic circulation

Coronary circulation

Hepatic circulation

34. Which phase of the cardiac cycle involves contraction of the ventricles?

Atrial systole

Ventricular diastole

Atrial diastole

Ventricular systole

35. Where does blood go immediately after leaving the left ventricle?

Pulmonary artery

Aorta

Left atrium

Vena cava

36. Which lymphatic organ is involved in the maturation of T-cells?

Spleen

Liver

Bone marrow

Thymus

37. Which part of the cardiac cycle is responsible for the filling of the ventricles?

Atrial systole

Ventricular systole

Ventricular diastole

Atrial diastole

38. Where are lymph nodes most commonly found?

In the heart

Under the skin

Inside bones

Along large blood vessels

39. Which blood vessels allow exchange of gases, nutrients, and waste?

Veins

Arterioles

Arteries

Capillaries

40. Which component of the heart separates the left and right sides?

Myocardium

Pericardium

Valve

Septum

41. What is the main function of red blood cells?

Blood clotting

Oxygen transport

Hormone transport

Defense against infection

42. Which blood vessel carries oxygen-rich blood from the lungs to the heart?

Pulmonary vein

Aorta

Vena cava

Pulmonary artery

43. Which vessels have valves to prevent backflow of blood?

Arterioles

Veins

Arteries

Capillaries

44. Which lymphatic organ is located in the upper left abdomen and stores white blood cells?

Pancreas

Spleen

Kidney

Liver

45. Which layer of the heart contains cardiac muscle?

Epicardium

Myocardium

Endocardium

Pericardium

46. Which side of the heart handles oxygen-rich blood?

Both sides

Left side

Right side

Neither

47. Which chamber of the heart pumps blood into the pulmonary circulation?

Left atrium

Right atrium

Left ventricle

Right ventricle

48. What is the function of the lymph nodes?

Filter lymph and fight infection

Pump lymph

Transport oxygen

Store blood

49. The closing of which valves prevents backflow into the ventricles?

Atrioventricular valves

Tricuspid valves

Semilunar valves

Pulmonary valves

You Can Learn and Gain more Knowledge through our Online Quiz and Testing system Just Search your desired Preparation subject at Gotest.

PMDC MDCAT Registration Online 2025 Last Date
MDCAT Test Schedule 2025 Dates Announced
MDCAT Physics Vactors And Equilibrium Online Test
MDCAT Fundamental Concepts of Chemistry Test Online MCQs
MDCAT Biology Inheritance Test Online MCQs
MDCAT Biology Acellular life Test Online
MDCAT Biology Variety of Life Test Online MCQs
MDCAT Biology Fields of Specialization Online Test MCQS
MDCAT Biology Kingdom of Protista Online Test MCQS
MDCAT Biology Fungi Online Test MCQS

Mustansar KhanLast Updated: June 14, 2025

Facebook Twitter Reddit WhatsApp Share via Email Print

MDCAT Biology Circulation Online Test

MDCAT Biology Circulation Test

MDCAT Biology Circulation Chaper 11 Online Test

MDCAT Biology Circulation MCQS Online Test

Uncategorized

You Might Also Like

Mustansar Khan

Leave a Reply Cancel reply

MDCAT Biology Circulation Test

MDCAT Biology Circulation Chaper 11 Online Test

MDCAT Biology Circulation MCQS Online Test

Uncategorized

You Might Also Like

Mustansar Khan

Your Related

MDCAT Biology Kingdom Prokaryotes Test Online Mcqs

MDCAT Chemistry Periodic Classification Of Elements & Periodicity Online Test

Rawalpindi Medical College RMC Entry Test Result 2025

FMH Entry Test Result 2025 Answer Key Merit Lists Online

Rawalpindi Medical College RMC 2025 Entry Test Preparation Online

MDCAT Biology Biodiversity Test Online MCQs

Leave a Reply Cancel reply