431437
| Questão | Responda |
| 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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