Digestion Regulation

Digestion Regulation - through glycogenolysis to make...

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Digestion Regulation regulation of digestive tract  - controlled by nervous/endocrine systems  nervous system stimulates salivary/gastric secretions in response to food food in stomach >> gastrin secreted >> pepsinogen, HCl secreted (cycle controlled by negative feedback) chymes goes into duodenum >> inhibits stomach contractions >> no additional chyme enters small intestine enterogastrones - duodenal hormones in blood that controls stomach, gastric inhibition liver regulatory functions - can modify absorbed substances from digestive tract before they get to other part of body o removes toxins, poisons from body o produces most of proteins in blood plasma o edema - when concentration of plasma proteins drops too low regulation of blood glucose concentration - neurons get energy from glucose in blood plasma o insulin - stimulates conversion of glucose to glycogen o blood glucose level decrease >> liver secretes glycogen, gets broken down by glucagon
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Unformatted text preview: through glycogenolysis to make glucose o gluconeogenesis- makes glucose from other molecules energy expenditure - eat food >> provides energy source, raw materials • basal metabolic rate (BMR) - minimum rate of energy use • obesity - having so much fat that it’s unhealthy • regulation of food intake- adipose tissue secretes satiety factor to decrease appetite o obesity due to lack of sensitivity to protein created by satiety factor? • anorexia nervosa - people starve themselves • bulimia - people gorge themselves, then vomit everything • essential nutrients- cannot be made by animal, but necessary for health o vitamins - organic substances needed in humans (humans can not longer made vitamin C) o not enough vitamin C >> scurvy o 9 essential amino acids for humans o essential minerals - calcium, phosphorus, inorganic substances...
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This note was uploaded on 01/04/2012 for the course BSC BSC1005 taught by Professor Orlando,rebecca during the Fall '10 term at Broward College.

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