Neco Model Questions Vol1 2018 Biology Question 8

Practice objective / multiple choice question 8 from the 2018 Neco Model Questions Vol1 Biology examination.

Neco Model Questions Vol1 2018 Biology Objective / Multiple Choice Medium Difficulty
Question 8 NECO_MODEL_QUESTIONS_VOL1 • 2018 • BIOLOGY • objective

A person at rest has a basal metabolic rate (BMR) of \(80\ \text{kcal h}^{-1}\), producing heat that must be dissipated to keep the core temperature at \(37^{\circ}\text{C}\). In a cold environment of \(5^{\circ}\text{C}\), the person wears a jacket with thermal resistance \(R = 0.3\ ^{\circ}\text{C h kcal}^{-1}\). Heat loss to the environment follows \( Q = \frac{\Delta T}{R}\), where \(\Delta T\) is the temperature difference between the skin (assumed equal to core) and the ambient. (i) Determine the rate of heat loss \(Q\) (kcal h\(^{-1}\)). (ii) Calculate the additional metabolic heat (kcal h\(^{-1}\)) the person must generate to maintain core temperature.

Answer Options

A. Heat loss ≈ 120 kcal h⁻¹; an additional 40 kcal h⁻¹ of metabolic heat is required.
B. Heat loss ≈ 95 kcal h⁻¹; an additional 15 kcal h⁻¹ of metabolic heat is required.
C. Heat loss ≈ 80 kcal h⁻¹; an additional 0 kcal h⁻¹ of metabolic heat is required.
Correct Answer D. Heat loss ≈ 107 kcal h⁻¹; an additional 27 kcal h⁻¹ of metabolic heat is required.
Correct Answer
D
Correct Option:
Heat loss ≈ 107 kcal h⁻¹; an additional 27 kcal h⁻¹ of metabolic heat is required.

About This Question

This is Neco Model Questions Vol1 2018 Biology Question 8. It is one of the objective questions from the 2018 Neco Model Questions Vol1 Biology examination.

Difficulty level: Medium .

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