Kidneys Flashcards

1
Q

when is ADH released

A

when osmoreceptors in the hypothalamus detects the body is dehydrated it stimulates the pituitary glands to secrete ADH

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2
Q

what does ADH do? what does this do to urine?

A

allows makes walls of the collecting duct more permeable to water. more water can pass back into the blood from the collecting duct. this makes urine more concentrated.

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3
Q

why is a constant body temperature important

A

so that enzymes function properly

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4
Q

negative feedback

A

a response to bring about the opposite effect of a stimulus eg too much water, too hot, too much glucose in blood

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5
Q

Example of a negative feedback ‘closed loop’

A

ADH is released when the body is dehydrated. when the body’s water concentration returns to normal ADH stops being released and the body reabsorbs less water.

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6
Q

advantages of being homeothermic

A

chemical reactions can happen at a predictable rate

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