BUS 17 Lecture Notes - Lecture 11: Hypoglycemia, Thermostat, Arcuate Nucleus

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12 Nov 2020
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Digestion: gastrointestinal (in gastrointestinal tract) process of breaking down food and absorbing its constituents into the body. ->purpose of eating: supplying body with nutrients to maintain its function. Comes into the body in three forms: lipids, amino acids, glucose. Are stored in other forms: fat ( 85%), protein (14%), glycogen (0,5%) Fat can store twice as much energy as glycogen. Promotes use of glucose as primary source of energy. Promotes conversion of incoming molecules to forms that can be stored (see above) Promotes storage of stored forms into different body parts (fat-adipose tissue, protein- muscles, glycogen-liver and muscle) -->allows glucose to enter body cells (absorptive phase), no insulin needed for glucose to enter brain cells. -->low levels of insulin (fasting phase): glucose only used to supply brain with energy. Released from pancreas when fall in glucose is detected. Stimulates the conversion of liver glycogen (stored glucose) to glucose. Promotes release of free fatty acids from adipose tissue.

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