The Results of a Study by Pellis and His Colleagues

question 23

Multiple Choice

The results of a study by Pellis and his colleagues suggest that cats that appear to be playing with mice are,in fact,

• A) on drugs.
• B) playing with mice.
• C) vacillating between attack and defense.
• D) vacillating between predatory and social aggression.
• E) vacillating between lateral attack and boxing.

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Definitions:

Circadian Rhythms

Physical, mental, and behavioral changes that follow a 24-hour cycle, responding primarily to light and darkness in an organism's environment, affecting sleep patterns among other bodily functions.

Biological Clock

An internal mechanism that regulates bodily rhythms and cycles, such as sleep and wakefulness, on a roughly 24-hour cycle.

Pineal Gland

A small endocrine gland in the brain that produces the hormone melatonin, which regulates sleep and wakefulness.

Melatonin

A hormone produced by the pineal gland that regulates sleep-wake cycles and is influenced by the presence of light.