Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
ISBN: 9781337408332



Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
ISBN: 9781337408332
Textbook Problem

How does the human body respond to an increase in core body temperature?

  1. a. Decreased blood flow to the skin
  2. b. Increased sweating
  3. c. Increased activity of brown adipose tissue
  4. d. Secretion of aldosterone

Summary Introduction

Introduction: Sweating is the main mechanism of cooling in large hoofed mammals and in primates including humans. Sweat glands are exocrine glands that release water and solutes through a pore at the skin’s surface. Evaporation of the water in sweat cools the skin. Humans have a denser array of sweat glands than other primates. A thick coat of hair slows evaporative cooling and insulates the body, thus reducing the heat lost by convection. Humans have sparse body hair that helps in more sweating.


Reasons for the correct statement:

More evaporation of water in increased sweating cools the skin that helps to maintain the body temperature.

Hence, option b. is correct.

Reasons for the incorrect statement:

Option a. is given as “Decreased blood flow to the skin”. But, decreased blood flow prevents the heat loss that increases the body temperature. This will not be helpful to maintain the body temperature if core body temperature gets increased.

So, option a. is incorrect answer.

Option c. is given as “Increased activity of brown adipose tissue”...

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