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10 Cards in this Set
- Front
- Back
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What is vasopressin
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it is a hormone which raises blood pressure b constricting the blood vessels
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How does vasopressin help with water regulation
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When you get dehydrated increased pressure helps compensate for the decreased volume
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What is another name for vasopressin and why is it called this
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antidiuretic hormone because it enables the kidneys to reabsorb water from urine and make the urine more concentrated
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What are the two different kinds of thirst and how are they caused
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osmotic thirst and hypovolemic thirst osmotic is caused by eating or drinking salty things hypovolemic is caused by bleeding or sweating
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What is osmotic pressure
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the tendency of water to flow across a semipermeable membrane from the area of low solute concentration to the area of higher concentration
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How does salt intake effect the cells
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it forces the water out of the cells called osmotic thirst
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How does the brain detect osmotic pressure
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in the areas around the third ventrical because it has a weak blood brain barrier so it can detect these changes
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What is the OVLT and the subfornical organ
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they are areas in the brain important for detecting osmotic pressure
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When the areas of the body detect salt changes what areas of the brain are notified and what do they do
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The supraoptic nucleus and the paraventricular nucleus which are parts of the hypothalmus these control the rate that the pituitary secretes vasopressin
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Which parts of the hypothalmus control thirst
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the lateral preoptic area
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