The active process of keeping the internal environment constant.
A part of the brain called __________ is at the centre on the control mechanism that keeps internal temperature constant.
hypothalamus
If your body temperature falls below 37 degree C, nerve impulses from the hypothalamus cause the following things to happen like _______________________ (hairs) and _________________________((arterioles).
hairs erect to trap a layer of warm air which insulate it and arterioles constrict so not much blood flows through them, thus conserving heat
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