Waec Model Questions Vol1 2023 Biology Question 7

Practice essay / theory question 7 from the 2023 Waec Model Questions Vol1 Biology examination. This question covers Homeostasis .

Waec Model Questions Vol1 2023 Biology Essay / Theory

Topic: Homeostasis

Question 7 WAEC_MODEL_QUESTIONS_VOL1 • 2023 • BIOLOGY • essay

Two different homeostatic disturbances are described below: (i) A healthy adult is suddenly exposed to a hot, humid environment and begins to sweat profusely. (ii) A 45‑year‑old man with type‑2 diabetes mellitus has chronically elevated blood glucose levels because of insufficient insulin secretion. Using these situations, answer the following:

Question Parts

( a )

Explain the negative feedback mechanism that regulates body temperature in situation (i). Include the sensor, integrating centre, and effector in your answer.

( b )

Describe the negative feedback loop that controls blood glucose concentration in situation (ii). Mention the key organs, hormones and cellular actions involved.

( c )

Compare the temperature‑regulation and blood‑glucose‑regulation feedback mechanisms in terms of their sensors, effectors and the speed of response.

( d )

Discuss the likely physiological consequences if each of the two feedback mechanisms fails.

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About This Question

This is Waec Model Questions Vol1 2023 Biology Question 7. It is one of the essay questions from the 2023 Waec Model Questions Vol1 Biology examination.

The question covers Homeostasis .

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