Class 10 The Circulatory System Mock Test (ICSE)

Topics in The Circulatory System

• Composition of blood
• Blood groups and transfusion
• Structure of the heart
• Cardiac cycle and double circulation
• Blood vessels
• Lymphatic system

The Circulatory System practice questions with answers

1. Q1Multiple choice·1 mark
   Which valve is situated between the left atrium and the left ventricle in the human heart?

   1. (a)Semilunar valve
   2. (b)Bicuspid valve
   3. (c)Tricuspid valve
   4. (d)Eustachian valve
   Show answer and step marks

   1. Correct option: (b) Bicuspid valve+1

   Answer: (b)
2. Q2Multiple choice·1 mark
   Which of the following blood cells are non-nucleated, biconcave, and primarily responsible for the transport of respiratory gases?

   1. (a)Thrombocytes
   2. (b)Leucocytes
   3. (c)Erythrocytes
   4. (d)Lymphocytes
   Show answer and step marks

   1. Correct option: (c) Erythrocytes+1

   Answer: (c)
3. Q3Multiple choice·1 mark
   Which of the following fluids acts as the 'middle man' between blood and tissue cells by transporting oxygen, nutrients, and waste products?

   1. (a)Cerebrospinal fluid
   2. (b)Lymph
   3. (c)Blood plasma
   4. (d)Serum
   Show answer and step marks

   1. Correct option: (b) Lymph+1

   Answer: (b)
4. Q4Multiple choice·1 mark
   Why is a person with blood group AB referred to as a universal recipient?

   1. (a)Presence of both antibodies 'a' and 'b' in the plasma
   2. (b)Absence of antigens A and B on the red blood cells
   3. (c)Absence of both antibodies 'a' and 'b' in the plasma
   4. (d)Presence of antigen A only on the red blood cells
   Show answer and step marks

   1. Correct option: (c) Absence of both antibodies 'a' and 'b' in the plasma+1

   Answer: (c)
5. Q5Long answer·4 marks
   Answer the following questions regarding the blood vessels in the human circulatory system: (a) State the functional significance of capillaries having walls that are only one cell thick. [1] (b) Give a biological reason why arteries have thick, elastic walls. [1] (c) Differentiate between arteries and veins on the basis of: (i) direction of blood flow, and (ii) type of blood they carry. [2]
   Show answer and step marks

   1. (a) It facilitates rapid and efficient diffusion of gases, nutrients, and waste products between the blood and surrounding tissue cells.+1
   2. (b) Arteries receive blood pumped under high pressure from the heart; thick and elastic walls help them expand and withstand this high pressure without bursting.+1
   3. (c)(i) Direction of flow: arteries carry blood away from the heart to the organs, whereas veins carry blood from the organs towards the heart.+1
   4. (c)(ii) Type of blood: arteries carry oxygenated blood (except the pulmonary artery), whereas veins carry deoxygenated blood (except the pulmonary vein).+1

   Answer: (a) Thin walls allow rapid diffusion of gases, nutrients and wastes between blood and tissues. (b) They carry blood under high pressure from the heart; thick elastic walls withstand and even out this pressure. (c) (i) Arteries carry blood away from the heart, veins towards it. (ii) Arteries carry oxygenated blood (except the pulmonary artery), veins deoxygenated blood (except the pulmonary vein).

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