Cannon, Walter B.

(kan′ŏn )

U.S. physiologist, 1871-1954.

Cannon ring

A contracted band of muscles in the transverse colon near the hepatic flexure.

fight-or-flight reaction of Cannon

The generalized response to an emergency situation. This includes intense stimulation of the sympathetic nervous system and the adrenal gland. The heart and respiratory rates, blood pressure, and blood flow to muscles are increased. This response prepares the body either to flee or to fight.
SEE: freeze-hide behavior

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