Neco Model Questions Vol1 2025 Biology Question 33

Practice objective / multiple choice question 33 from the 2025 Neco Model Questions Vol1 Biology examination.

Neco Model Questions Vol1 2025 Biology Objective / Multiple Choice Medium Difficulty
Question 33 NECO_MODEL_QUESTIONS_VOL1 • 2025 • BIOLOGY • objective

A small mammal has a basal metabolic rate (BMR) of \(70\) kcal·h⁻¹. When exposed to a cold environment (ambient temperature \(5\) °C) it can increase its metabolic heat production by 30 % and simultaneously reduce its thermal conductance from \(0.12\) kcal·h⁻¹·°C⁻¹ to \(0.08\) kcal·h⁻¹·°C⁻¹ by vasoconstriction. The animal's core temperature target is \(37\) °C. Assuming heat loss = conductance × (core - ambient), calculate (a) the net heat gain per hour under these cold‑stress adjustments and (b) state whether the animal can maintain its core temperature without shivering.

Answer Options

A. Net heat gain ≈ 92.00 kcal·h⁻¹; the animal can maintain core temperature without shivering.
B. Net heat gain ≈ 88.44 kcal·h⁻¹; the animal cannot maintain core temperature without shivering.
C. Net heat gain ≈ 85.00 kcal·h⁻¹; the animal can maintain core temperature without shivering.
Correct Answer D. Net heat gain ≈ 88.44 kcal·h⁻¹; the animal can maintain core temperature without shivering.
Correct Answer
D
Correct Option:
Net heat gain ≈ 88.44 kcal·h⁻¹; the animal can maintain core temperature without shivering.

About This Question

This is Neco Model Questions Vol1 2025 Biology Question 33. It is one of the objective questions from the 2025 Neco Model Questions Vol1 Biology examination.

Difficulty level: Medium .

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