Psych335-EnergyReg

Psych335-EnergyReg - Hunger and Regulation of Energy...

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Hunger and Regulation of Energy Balance What are the internal signals that elicit motivated behavior? Something to do with the amount of energy available for oxidation and generation of ATP. Nearly all the body’s energy comes from: Glucose After being absorbed from the gut, a number of things can happen to glucose: 1. It can be taken up and oxidized to generate ATP. Glucose oxidation: All cells in the body use glucose for energy- all of them except the brain can use fatty acids, too. The brain is an obligatory oxidizer of glucose- it cannot use other metabolic fules except under highly unusual circumstances (prolonged starvation). Insulin is required for glucose to leave the blood stream and enter cells (except the brain, mostly) In the absence of insulin (diabetes mellitus), glucose cannot enter cells (except in the brain), so it builds up in the blood and causes hyperglycemia (high blood sugar). Diabetes mellitus - excessive urination - tastes sweet
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This note was uploaded on 04/29/2008 for the course PSYCH 335 taught by Professor Georgewade during the Spring '08 term at UMass (Amherst).

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Psych335-EnergyReg - Hunger and Regulation of Energy...

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