Controlling Body Temperature

Description

A Levels Biology (Homeostasis) Flashcards on Controlling Body Temperature, created by beccak432 on 10/12/2013.
beccak432
Flashcards by beccak432, updated more than 1 year ago
beccak432
Created by beccak432 almost 11 years ago
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Resource summary

Question Answer
Thermoregulation The body's core temperature is monitored by receptors in the hypothalamus
Endotherms Animals that maintain a constant, warm body temperature e.g. mammals, birds
Ectotherms 'Cold-blooded' organisms, heat comes from their surroundings
When the temperature drops... - less sweat; less evaporation of water; less loss of latent heat - hairs raised to trap a layer of air (insulates) - vasoconstriction
When the temperature rises... - sweating; water evaporates; latent heat of vaporisation - hairs lie flat, providing little insulation; more heat lost through convection/radiation - vasodilation
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