Online Test — Body Fluids and Circulation
15 Questions • 15 min • Chapter MCQ
15:00
Question 1 of 15
The liquid part of blood is called:
Plasma
Serum only
Lymph
Bile
Explanation: Plasma is the pale-yellow liquid part of blood.
Question 2 of 15
Oxygen is carried mainly by:
White blood cells
Red blood cells
Platelets
Plasma proteins
Explanation: RBCs carry oxygen using haemoglobin.
Question 3 of 15
Cells that defend the body against germs are:
Red blood cells
White blood cells
Platelets
Nerve cells
Explanation: WBCs (leucocytes) provide immunity/defence.
Question 4 of 15
Blood clotting is helped by:
RBCs
Platelets
Plasma water
WBCs only
Explanation: Platelets help the blood to clot.
Question 5 of 15
The universal recipient blood group is:
O
A
B
AB
Explanation: Group AB is the universal recipient.
Question 6 of 15
A colourless body fluid with no RBCs that bathes the cells is:
Bile
Lymph
Urine
Saliva
Explanation: Lymph is the colourless tissue fluid with no RBCs.
Question 7 of 15
The human heart has how many chambers?
Two
Three
Four
Five
Explanation: The human heart has four chambers.
Question 8 of 15
The upper chambers of the heart are the:
Ventricles
Atria
Valves
Arteries
Explanation: The atria are the upper receiving chambers.
Question 9 of 15
Heart valves mainly:
Make blood
Prevent back-flow of blood
Filter blood
Store blood
Explanation: Valves keep blood flowing one way and prevent back-flow.
Question 10 of 15
Passage of blood through the heart twice in one round is called:
Single circulation
Double circulation
Open circulation
No circulation
Explanation: Humans have double circulation (pulmonary + systemic).
Question 11 of 15
Vessels that carry blood back to the heart are:
Arteries
Veins
Capillaries
Lacteals
Explanation: Veins carry blood back to the heart and have valves.
Question 12 of 15
Exchange of materials between blood and cells happens in the:
Arteries
Veins
Capillaries
Atria
Explanation: Thin-walled capillaries allow exchange with tissues.
Question 13 of 15
The contraction phase of the heart is called:
Diastole
Systole
Lymph
Plasma
Explanation: Systole is contraction; diastole is relaxation.
Question 14 of 15
Persistently high blood pressure is called:
Hypertension
Anaemia
Jaundice
Diabetes
Explanation: Hypertension is persistently high blood pressure.
Question 15 of 15
Sudden blockage of blood supply to part of the heart muscle is a:
Heart attack
Common cold
Fracture
Allergy
Explanation: A blocked supply causing heart-muscle damage is a heart attack.