iphy 3430 lecture 4

iphy 3430 lecture 4 - Sweating Hypothalamus -> SNS output->...

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Sweating Hypothalamus --> SNS output--> SNS releases acetylcholine (ACH) on sweat glands--> stimulates Na+ active (with ATP) transport out of sweat gland --> Cl- follows passively--> water follows movement of ions Skin surface Sweat gland SNS nerve Na, Cl, water
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Sweating continued…. As the Na+, Cl- and water continue up the duct toward the skin surface, K+ exchanged for Na+, HCO3- exchanged for Cl- with expenditure of ATP.
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Sweating, continued…. When the ionic mixture reaches the skin surface, water is evaporated, leaving the ions on the skin. Na+, Cl-, K+, HCO3- Water
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Sweating is a highly effective way of losing heat. More heat can by lost by a gram of sweat than is produced by the manufacture of that amount of sweat.
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Regulation of body temperature Body temperature is the only homeostatically regulated variable that is not allowed to change before the regulator takes action. The regulator takes action in response to a potential change in body temperature, not an actual one.
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Tb --> sensors--> hypothalamus -->
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This note was uploaded on 05/25/2008 for the course IPHY 3430 taught by Professor Lynch,robe during the Summer '08 term at Colorado.

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iphy 3430 lecture 4 - Sweating Hypothalamus -> SNS output->...

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