alarm reaction

alarm reaction
noun Date: 1936 the initial reaction of an organism (as increased hormonal activity) to stress

New Collegiate Dictionary. 2001.

Look at other dictionaries:

  • alarm reaction — ə lärm n the initial reaction of an organism (as increased hormonal activity) to stress * * * the physiologic effects in response to acute stress, fright, or rage (increased blood pressure and cardiac output, increased blood flow to skeletal… …   Medical dictionary

  • alarm reaction — Physiol. the first stage of the general adaptation syndrome, in which the body responds to stress by exhibiting shock. [1935 40] * * * …   Universalium

  • alarm reaction — noun 1. : the first stage of the adaptation syndrome during which the anterior pituitary gland is stimulated to increased secretory activity 2. : a series of muscular movements frequently repeated according to a regular pattern that certain birds …   Useful english dictionary

  • alarm — 1. noun /əˈlɑːm,əˈlɑɹm/ a) A summons to arms, as on the approach of an enemy. Arming to answer in a night alarm. Shakespeare. b) Any sound or information intended to give notice of approaching danger; a warning sound to arouse …   Wiktionary

  • alarm signal — ▪ zoology       in zoology, a ritualized means of communicating a danger or threat among the members of an animal group. In many cases the signal is visual or vocal, but some animals ants, bees, and certain fishes, for example secrete chemical… …   Universalium

  • Alarm — An alarm (French: À l arme To the arms ) gives an audible or visual warning of a problem or condition.Alarms include: * burglar alarms, designed to warn of burglaries; this is often a silent alarm: the police or guards are warned without… …   Wikipedia

  • alarm substance — a substance produced in the round or oval alarm substance cells (previously called “clubcells ) in the skin of Ostariophysi (Cypriniformes, Siluriformes) and Gonorhynchiformes, and which is released upon injury of the skin. On scenting the alarm… …   Dictionary of ichthyology

  • reaction — 1. The response of a muscle or other living tissue or organism to a stimulus. 2. The color change effected in litmus and certain other organic pigments by contact with substances such as acids or alkalies; also the property that such substances… …   Medical dictionary

  • Startle reaction — The startle reaction, also called the startle response, startle reflex or alarm reaction, is the response of mind and body to a sudden unexpected stimulus, such as a flash of light, a loud noise (acoustic startle reflex), or a quick movement near …   Wikipedia

  • fight-or-flight reaction — alarm r …   Medical dictionary

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