B2 HOMEOSTASIS

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  • Created by: Tami
  • Created on: 16-05-16 21:36
What are receptors?
they detect change in the environment
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What do processing centers do?
They receive information and determine how the body will respond
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What do effectors do?
Produce a response
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What is homeostasis?
The maintenance of a constant environment
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What are the main factors to which must be kept at a constant to enable the body to work?
Temperature, PH and levels of sugar, water and salt
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How is water taken in ?
By eating and drinking
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How is water lost?
faeces and urine
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Why must the water content of our body be maintained?
to keep the body's cells bathed in blood plasma. So, the concentration of water must be kept at a constant.
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What affects the concentration of blood plasma?
external temperature, exercise levels and intake of fluids and salt.
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How do the kidneys respond to changes in the blood plasma?
They change the concentration of urine that is excreted from the bidy.
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How do drugs affect the water balance of the body?
- Alcohol causes the kidney to produce large amounts of dilute urine and this causes the body to be dehydrated. -Ecstasy causes the kidneys to produce small volumes of concentrated urine . The body cells swell with water.
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what is anti-diuretic hormone (ADH) ?
it is released by the pituitary glands in response to changes in the concentration of blood plasma.
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How does drugs affect ADH?
-alcohol supresses the release of ADH, so less water is reabsorbed by the kidneys. - Ecstasy increses ADH production so more water is reabsorbed by the kidneys.
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Other cards in this set

Card 2

Front

What do processing centers do?

Back

They receive information and determine how the body will respond

Card 3

Front

What do effectors do?

Back

Preview of the front of card 3

Card 4

Front

What is homeostasis?

Back

Preview of the front of card 4

Card 5

Front

What are the main factors to which must be kept at a constant to enable the body to work?

Back

Preview of the front of card 5
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