Neco Model Questions Vol1 2020 Biology Question 7

Practice essay / theory question 7 from the 2020 Neco Model Questions Vol1 Biology examination. This question covers Homeostasis .

Neco Model Questions Vol1 2020 Biology Essay / Theory
Topic: Homeostasis
Question 7 NECO_MODEL_QUESTIONS_VOL1 • 2020 • BIOLOGY • essay

Explain how the human body maintains internal stability when exposed to external temperature changes.

Question Parts

( a )
Describe the role of the hypothalamus in thermoregulation, stating the type of feedback involved.
( b )
Outline the physiological responses that occur when a person is suddenly exposed to a cold environment, indicating the organs or tissues involved and the direction of change (e.g., vasoconstriction, shivering).
( c )
Compare the mechanisms of heat loss in humans with those of a mammal that relies primarily on evaporative cooling (e.g., a dog). Discuss one advantage and one limitation of each mechanism.
( d )
A patient with a lesion in the sympathetic spinal cord (T1–T3) cannot sweat on the chest and upper abdomen. Predict how this defect would affect the individual's ability to regulate body temperature in a hot environment and suggest two management strategies.

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About This Question

This is Neco Model Questions Vol1 2020 Biology Question 7. It is one of the essay questions from the 2020 Neco Model Questions Vol1 Biology examination.

The question covers Homeostasis .

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