Chapter 20. 20·7–20·8 Animals have an internal environment.

Show What You Know - Self Quiz

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You must read each slide, and complete any questions on the slide, in sequence.

Instructions

Check your understanding of concepts from 20·7–20·8 Animals have an internal environment by answering the following questions.

1.

1. When an organism’s body temperature is below normal, it is suffering from:

hypothermia.

shivering.

a cold.

thermogenesis.

hibernation.

Correct. (See section 20·7 Our bodies function best within a narrow range of internal conditions.)

Incorrect. (See section 20·7 Our bodies function best within a narrow range of internal conditions.)

2.

2. Heat stroke is a condition brought on by:

swimming in warm water.

hyperthermia.

dehydration.

drinking too much water.

hypothermia.

Correct. (See section 20·7 Our bodies function best within a narrow range of internal conditions.)

Incorrect. (See section 20·7 Our bodies function best within a narrow range of internal conditions.)

3.

3. The internal environment of multicellular animals is influenced mostly by their external environment and:

the activities of other cells in the body.

the homeostasis of nearby organisms.

whether or not the animal has urinated or defecated recently.

the season of the year.

the genes carried by different cells.

Correct. (See section 20·8 Animals regulate their internal environment through homeostasis.)

Incorrect. (See section 20·8 Animals regulate their internal environment through homeostasis.)

4.

4. The most immediate reason(s) why homeostasis is important in the human body is that:

growth stops when the body is out of balance.

the rate of cell division slows when the body is out of balance.

enzymes inside and outside cells cease to perform essential metabolic functions if conditions cause changes in their shapes.

the body will dehydrate if too much water is in the blood.

Both A and C are true.

Correct. (See section 20·8 Animals regulate their internal environment through homeostasis.)

Incorrect. (See section 20·8 Animals regulate their internal environment through homeostasis.)

5.

5. Interstitial fluid:

is found exclusively within the spinal cord, surrounding the nerve bundles.

occurs within the organelles of all eukaryotic cells.

is found exclusively within the skull, surrounding the brain.

is mostly water.

is found exclusively within the skull and spinal cord, surrounding nervous tissue.

Correct. (See section 20·8 Animals regulate their internal environment through homeostasis.)

Incorrect. (See section 20·8 Animals regulate their internal environment through homeostasis.)

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