Gce Model Questions Vol1 2021 Biology Question 7

Practice essay / theory question 7 from the 2021 Gce Model Questions Vol1 Biology examination. This question covers Homeostasis, Regulation of blood glucose, Thermoregulation, Water balance .

Gce Model Questions Vol1 2021 Biology Essay / Theory
Topics: Homeostasis Regulation of blood glucose Thermoregulation Water balance
Question 7 GCE_MODEL_QUESTIONS_VOL1 • 2021 • BIOLOGY • essay

Homeostasis is the process by which living organisms maintain internal stability despite external changes.

Question Parts

( a )
Explain how the pancreas contributes to the regulation of blood glucose concentration. Include the hormones involved and describe the feedback mechanism.
( b )
Describe the negative feedback loop that controls human body temperature. Identify the sensor, integrating centre and effector(s) and explain how they interact when core temperature rises above normal.
( c )
A person has been trekking in a hot desert for several days and now shows signs of dehydration. Using your knowledge of homeostatic control, answer the following.
( ) Explain how the osmoreceptors detect the change in plasma osmolality and the subsequent hormonal response.
( ) Describe how the kidneys adjust urine output to conserve water, mentioning the role of ADH and the principle of water reabsorption in the collecting ducts.

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About This Question

This is Gce Model Questions Vol1 2021 Biology Question 7. It is one of the essay questions from the 2021 Gce Model Questions Vol1 Biology examination.

The question covers Homeostasis, Regulation of blood glucose, Thermoregulation, Water balance .

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