Neco 2018 Biology Question 3

Practice objective / multiple choice question 3 from the 2018 Neco Biology examination.

Neco 2018 Biology Objective / Multiple Choice Medium Difficulty
Question 3 NECO • 2018 • BIOLOGY • objective

A resting adult has a body surface area of 1.8\,m\(^2\) and a basal metabolic heat production of 80\,W\,m\(^{-2}\). She is in an environment at 10\,°C while wearing clothing with an insulation value of 0.5\,clo (1\,clo = 0.155\,m\(^2\)\,K\,W\(^{-1}\)). The overall heat transfer coefficient of the skin is 10\,W\,m\(^{-2}\)\,K\(^{-1}\). Assuming heat loss occurs by conduction/convection through the clothing and skin, calculate (a) the total heat loss from the body, (b) the additional metabolic heat (in watts) the body must generate to maintain core temperature of 37\,°C, and (c) the percentage increase in metabolic rate required.

Answer Options

A. Total loss ≈ 150 W; extra metabolic heat ≈ 10 W; increase ≈ 6.0 %
B. Total loss ≈ 165 W; extra metabolic heat ≈ 6 W; increase ≈ 4.2 %
C. Total loss ≈ 140 W; extra metabolic heat ≈ 12 W; increase ≈ 7.5 %
Correct Answer D. Total loss ≈ 152 W; extra metabolic heat ≈ 8 W; increase ≈ 5.6 %
Correct Answer
D
Correct Option:
Total loss ≈ 152 W; extra metabolic heat ≈ 8 W; increase ≈ 5.6 %

About This Question

This is Neco 2018 Biology Question 3. It is one of the objective questions from the 2018 Neco Biology examination.

Difficulty level: Medium .

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