Homeostasis
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| what is homeostasis? | show 🗑
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| show | suitable pH, suitable temperature, aqueous environment free from toxins and inhibitors
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| what is stimulus? | show 🗑
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| what is response? | show 🗑
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| examples of external fluctuations? | show 🗑
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| show | blood glucose, water, hormones
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| examples of homeostatic mechanisms? | show 🗑
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| show | stimulus - sensors - communication system - effectors - response
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| show | the sensors find that optimum conditions have been reached and sends a signal to the control center, which then switches off the effector
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| what is positive feedback? | show 🗑
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| show | stimulus; temperature increase - sensors; thermoreceptors in the skin - communication system; thermoregulatory centre in hypothamalus - effectors; blood vessels and sweat glands - response; blood vessels vasodilate, sweat is released
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| show | childbirth, oxytocin is released to cause contractions, taking the mother away from optimum conditions until baby is born
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| what is conduction? | show 🗑
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| what is convection? | show 🗑
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| show | heat released as a wave from a hot object?
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| show | heat lost when water changes from a liquid to a gas (e.g. sweat)
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| what is an endotherm? | show 🗑
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| what is an ectotherm? | show 🗑
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| show | able to live in cold areas, do not rely on sun and therefore aren't lethargic at night
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| show | consume lots of energy maintaining body temperature
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| show | blood capillaries constrict to prevent blood flowing near the skins surface to prevent heat loss through radiation, blood flows deep down
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| what is vasodilation? | show 🗑
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| show | the basic minimum amount of energy required to sustain the body's vital functions
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| what hormones affect BMR? | show 🗑
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| show | external environment fluctuations
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| show | denature (die)
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Created by:
deannarosee
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