CIE iGCSE Co-Ordinated Science B13.3 Homeostasis Exam Style Questions Paper 1
Question
The diagram shows a section through the skin.
Which labelled structures help to maintain body temperature in the cold?
A 1 and 3 B 1 and 4 C 2 and 3 D 3 and 4
▶️Answer/Explanation
Ans :A
Question
The graph shows the variation of body temperature over time of a healthy person at rest.
How will the body reverse the temperature change shown between times X and Y?
(A) decreased breathing rate
(B) decreased pulse rate
(C) shivering
(D) sweating
▶️Answer/Explanation
Ans: D
Question
A person leaves an air conditioned building.
The temperature of the air conditioned building is 16 ºC.
The outside temperature is 39 ºC.
Which statement describes one response to the change in temperature?
A The blood detects the change in temperature and the person starts to shiver.
B The blood detects the change in temperature and the person starts to sweat.
C The brain detects the change in temperature and the person starts to shiver.
D The brain detects the change in temperature and the person starts to sweat.
▶️Answer/Explanation
Ans : D
Question
The diagram shows a section through the skin.
Which row contains the correct names of the structures labelled P, Q and R?
▶️Answer/Explanation
Ans: C
Question
What is the definition of homeostasis?
A. Controlling body temperature
B. Controlling responses to stimuli
C. Maintaining a constant external environment
D. Maintaining a constant internal environment
▶️Answer/Explanation
Answer: D. Maintaining a constant internal environment
Explanation: Homeostasis refers to the maintenance of a stable internal environment within an organism, despite changes in external conditions.
Question
What is homeostasis?
A. keeping internal conditions constant
B. keeping the body at the same temperature as the environment
C. sweating to keep the body warm
D. vasoconstriction of arterioles to increase heat loss
▶️Answer/Explanation
Answer: A
Explanation: Homeostasis is the process by which the body maintains a stable internal environment, such as constant temperature, pH, and glucose levels, despite changes in external conditions.