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flight-or-fight responseFight-or-flight response, see there.
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.
e·mer·gen·cy the·o·ry(ē-mĕr'jĕn-sē thē'ŏr-ē)
A theory of the emotions, advanced by W.B. Cannon, that animal and human organisms respond to emergency situations by increased sympathetic nervous system activity including an increased catecholamine production with associated increases in blood pressure, heart and respiratory rates, and skeletal muscle blood flow.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012