Senior Secondary (HKDSE) · Biology

Regulation of body temperature : Practice Questions

5 multiple-choice questions marked as you go, and 5 written questions with worked solutions. All on Regulation of body temperature .

10 questions23 marksFree, no account

Question 1

1 mark

Which of the following correctly describes the role of the hypothalamus in the homeostatic regulation of body temperature?

Question 2

1 mark

During exposure to a cold environment, which of the following describes how shivering generates heat?

Question 3

1 mark

Which of the following correctly describes the negative feedback loop when the core body temperature falls below \(37^\circ\text{C}\)?

Question 4

1 mark

Which of the following is the most significant physiological mechanism for heat loss in humans when the ambient temperature is higher than body temperature?

Question 5

1 mark

During a fever, the body's thermoregulatory set point in the hypothalamus is temporarily raised. What is the immediate physiological consequence of this change?

Question 6

2 marks

When the body is exposed to a cold environment, the hair erector muscles contract. State the name of this response and identify the structure that acts as the effector.

Write your answer out first, then check it against the worked solution.

Question 7

3 marks

Describe the nervous coordination involved when temperature receptors in the skin detect a sharp drop in environmental temperature, leading to a protective response.

Write your answer out first, then check it against the worked solution.

Question 8

6 marks

Explain how vasoconstriction of skin arterioles and the diversion of blood to internal organs act together as a heat conservation mechanism, and predict the physiological effect on the skin surface temperature during this process.

Write your answer out first, then check it against the worked solution.

Question 9

3 marks

When a person is performing strenuous physical exercise, their core body temperature tends to rise significantly. To maintain homeostasis, the body initiates several mechanisms to increase heat loss.

Describe two distinct physiological mechanisms, primarily involving the skin and circulation, that work in a coordinated manner to facilitate heat dissipation during exercise, and explain the mechanism of action for each. (3 marks)

Write your answer out first, then check it against the worked solution.

Question 10

4 marks

The human body uses both immediate and sustained methods to increase heat generation when exposed to cold.

(a) Explain the physiological mechanism of shivering and state the system (nervous or endocrine) primarily responsible for initiating it. (2 marks)
(b) Describe the role of the hormone thyroxine in long-term heat production and explain why this response is considered more sustained than shivering. (2 marks)

Write your answer out first, then check it against the worked solution.

* The content provided by thinka is generated by AI and may not always be accurate or up-to-date. Please use it as a supplementary resource and verify with official materials.

You've seen the model answer. Now get yours marked.

This page can show you how a good answer looks. It cannot tell you what your answer was missing. thinka marks your written work against the real mark scheme in about 15 seconds.

Get My Answers Marked Back to the notes

Want more questions like these? Get a fresh set on this topic, marked as you go.