homeostasis Flashcards
homeostasis meaning
maintaining an internal stable environment within narrow limits even though the environment is changing.
how do endothermic animals prevent body temperature from decreasing
peripheral receptors are stimulated. This sends impulses to the hypothalamus. Vasoconstriction occurs where heat loss is reduced by radiation. Increased metabolic rate generates energy. Shivering generates heat energy. Erector hair muscles trap air.
2 coordination systems
nervous and endocrine
how does sweating regulate body temperature.
heat energy from blood in capillaries is absorbed by sweat which breaks the hydrogen bonds in water so it evaporates providing a cooling effect.
negative feedback
receptors detect any changes in normal conditions. A corrective mechanism acts to restore normal conditions.
