The Heart and Blood Vessels Practice Questions

Question 1

Q1. Knowledge Recall (1 mark)

Define a capillary.

Question 2

Q2. Application (2 marks)

Explain how the structure of the capillaries is related to their function.

Question 3

Q3. Data Analysis (3 marks)

The table shows the blood pressure of a person at rest and during exercise.

Situation

Systolic Blood Pressure (mmHg)

Rest

120

Calculate the percentage increase in systolic blood pressure during exercise.

Question 4

Q4. Knowledge Recall (2 marks)

State the two main functions of the heart.

Question 5

Q5. Application (3 marks)

Explain how the atrioventricular valves prevent backflow of blood into the atria.

Question 6

Q6. Data Analysis (4 marks)

The diagram shows a cross-section of a blood vessel.

[Diagram of blood vessel with four layers labeled: tunica intima, tunica media, tunica adventitia, lumen]

Identify the four layers of the blood vessel and state their main function.

Exercise

140

Layer

Function

Tunica intima

Innermost layer, lines the lumen (1)

Tunica media

Middle layer, contains smooth muscle (1)

Tunica adventitia

Outermost layer, provides support (1)

Question 7

Q7. Knowledge Recall (1 mark)

What is the name of the blood vessels that carry blood away from the heart?

Question 8

Q8. Application (2 marks)

Explain how the double circulatory system in mammals ensures more efficient oxygen delivery.

Question 9

Q9. Data Analysis (3 marks)

The graph shows the blood flow rate through a blood vessel at different pressures.

[Graph with pressure on x-axis and blood flow rate on y-axis]

Describe the relationship between blood pressure and blood flow rate, and explain the reason for this relationship.

Question 10

Q10. Knowledge Recall (2 marks)

State the four main blood types.

Lumen

Central cavity through which blood flows (1)

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