Pearson Edexcel IGCSE · Human Biology

Internal transport: Practice Questions

5 multiple-choice questions marked as you go, and 5 written questions with worked solutions. All on Internal transport.

10 questions24 marksFree, no account

Question 1

1 mark

A student is examining a blood smear under a light microscope. They identify a cell with a large, lobed nucleus and granular cytoplasm that is known to engulf pathogens. Which type of cell is this?

Question 2

1 mark

During the formation of tissue fluid, what happens to the excess fluid that is not reabsorbed into the blood capillaries at the venous end?

Question 3

1 mark

A person with blood group A is accidentally given a transfusion of blood group B. Which statement correctly describes the resulting reaction?

Question 4

1 mark

Which component of the blood is specifically involved in the process of phagocytosis to protect the body against infection?

Question 5

1 mark

Tissue fluid is formed at the arterial end of a capillary bed. Which factor is primarily responsible for forcing fluid out of the capillary into the surrounding intercellular spaces?

Question 6

2 marks

Explain how the presence of valves in veins contributes to the efficient return of blood to the heart.

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Question 7

3 marks

Explain how the biconcave shape and the absence of a nucleus in a mature erythrocyte are adaptations for its primary function in the blood.

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Question 8

5 marks

Analyze why the muscular wall of the left ventricle is significantly thicker than that of the right ventricle in the human heart.

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Question 9

4 marks

The diagram shows a vertical section through the human heart.

a) Identify the chambers labeled A and B in the diagram.
b) Name the blood vessel that carries deoxygenated blood from the heart to the lungs.
c) State the function of the septum in the heart.

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Question 10

5 marks

Red blood cells (erythrocytes) are highly specialized for the transport of oxygen.
a) Describe three structural adaptations of a red blood cell that allow it to carry out its function efficiently.
b) Name the iron-containing protein found in red blood cells and describe how it interacts with oxygen in the lungs and in the tissues.

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