GK Questions and Answers on Blood and its Composition

Blood is red in colour and performs various functions in the body. It circulates throughout our body and makes up approximately 8% of an adult’s body weight.

1. What are the main functions of blood?
A. Transport
B. Protection
C. Regulation
D. All the above
Ans. D
Explanation: The three main functions of blood are transport, protection and regulation.

2. Which of the following substance(s) is/are transported by the blood?
A. Oxygen and Carbon dioxide gases between the lungs and the rest of the body.
B. Waste products to be detoxified or removed by the liver or kidneys.
C. Nutrients from the digestive tract.
D. All the above
Ans. D
Explanation: Blood transports several substances including Gases like oxygen and carbon dioxide between lungs and rest of the body, nutrients from the digestive tract, waste products to be detoxified or removed by the liver or kidneys, hormones from the glands in which they are produced to their target cells and heat to the skin that helps to regulate the temperature of the body.

3. Red Blood Cells are also known as........
A. Erythrocytes
B. Platelets
C. Leukocytes
D. None of the above
Ans. A
Explanation: Red Blood Cells are also known as Erythrocytes and white blood cells are known as Leukocytes.

4. Platelets are also known as.....
A. Granulocytes
B. Monocytes
C. Thrombocytes
D. Globulins
Ans. C
Explanation: Platelets are also known as thrombocytes. They are specialised blood cells produced from bone marrow.

Human Circulatory System

5. Name the components that are found in Plasma?
A. Proteins
B. Gases
C. Nutrients
D. All the above
Ans. D
Explanation: Plasma consists of amino acids, proteins, nutrients, gases, etc.

6. Which of the following statement is/are correct about Red Blood Cells (RBC)?
A. RBC carries oxygen from the lungs to all the cells of the body.
B. It contains a pigment called Haemoglobin.
C. RBCs lack nucleus
D. All the above are correct
Ans. D
Explanation: RBC carries oxygen from the lungs to all the cells of the body. It lacks the nucleus and contains a pigment called Haemoglobin.

7. White Blood Cells are divided into how many parts?
A. Two
B. Three
C. Four
D. Five
Ans. A
Explanation: White Blood Cells or WBCs are also known as Leukocytes and can be divided into two parts i.e., granulocytes and agranulocytes.

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