Home / IB DP Biology D3.3 Homeostasis- FA 2025- IB Style Questions For SL Paper 1

IB DP Biology D3.3 Homeostasis- FA 2025- IB Style Questions For SL Paper 1

Question

The diagram shows the structure of human skin.

What are X, Y and Z?

Answer/Explanation

Ans:   C

Question

The diagram refers to questions 2 and 3. It shows a heterotrophic, unicellular, freshwater organism that has been placed in distilled water. The short arrows show movement of water and the long arrows show a sequence of steps.

What life function is illustrated?

A.  Nutrition

B.  Homeostasis

C.  Endocytosis

D.  Response

▶️Answer/Explanation

B

Question

The graph shows human body temperature variation in a daily rhythm of 24 hours.

Which hormone controls this variation?

A. Progesterone

B.  Insulin

C.  Glucagon

D.  Thyroxin

▶️Answer/Explanation

D

Question

How would the body respond to a rise above normal body temperature?

▶️Answer/Explanation

C

Question

What conveys messages from the central nervous system to an endocrine gland?

A.  Sensory neurons

B.  Hormones

C.  Interneurons

D.  Motor neurons

▶️Answer/Explanation

D

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