Biology: Concepts and Investigations
Biology: Concepts and Investigations
5th Edition
ISBN: 9781260259049
Author: Hoefnagels
Publisher: MCG
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Chapter 33, Problem 2MCQ
Summary Introduction

Introduction :

On earth, animals inhabit a variety of environments. Animals maintain homeostasis by adapting to their environment. Animals regulate their body temperature through a mechanism called thermoregulation.

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The cost of being endothermic is a high demand for energy (food) to support metabolic heat production. Compared with large endotherms (such as a polar bear), small endotherms (mouse) require feeding rates, partly because they have a surface area-to-volume ratio A. similar; similar B. lower; lower O C. higher; higher O D. lower; higher O E. higher; lower
Which of the following statements about metabolic heat is true? A. All animals produce metabolic heat B. Homeotherms rely on metabolic heat to maintain body temperature C. Animals that use metabolic heat to maintain body temperature are at lower risk of overheating than animals that do not use metabolic heat to maintain body temperature D. Relative to their body size, large animals lose more metabolic heat to the environment than small animals E. All of the above are true
Heat exchange with the environment depends on the surface area-to-volume ratio of the body. Assuming that the body shape of an animal is at least somewhat spherical, a considerable decrease in body size would _______ the surface area-to-volume ratio, and the ability to exchange heat with the environment would _______.     A. increase; increase   B. increase; stay about the same   C. increase; decrease    D. decrease; increase    E. decrease; stay about the same
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