Temperature Control Flashcards
Is skin a good site for recording temperature?
No
What does increased body temperature do to cellular metabolism?
increases
What can overheating cause?
protein denaturation, nerve malfunction, convulsions, and death
What do you have to be careful about when measuring oral temperature?
food, drink, tobacco etc can affect this
When in the day are we at our lowest temperature?
in the morning
When is female body temperature high during the menstrual cycle?
during 2nd half of cycle
What hormones can increase basal metabolic rate?
adrenaline, noradrenaline, and thyroxine
How much heat is lost from humans by radiation?
about half
What in the brain acts as the body’s thermostat?
hypothalamus
What is the posterior hypothalamic centre activated by?
cold
What is the anterior hypothalamic centre activated by?
heat
What happens to skin arterioles when a human is cold?
vasoconstriction
What do chemicals released from macrophages in response to infection or inflammation act as?
an endogenous pyrogen (e.g. interleukins)
What does endogenous pyrogen do?
stimulate the release of prostaglandins in the hypothalamus
What do prostaglandins act on?
the hypothalamic thermo-regulatory centre to “reset” the thermostat at a higher temperature
