NUTR 1010 Lecture Notes - Lecture 2: Anaphylaxis, Soy Yogurt, Sorbitol
1 Mar 2014
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-> your stomach and intestines send nerve signals to the hypothalamus of the brain. -> insulin and glucagon levels in the blood change. -> this is a signal for your hypothalamus (time to eat) Lots of other hormones have a role too it"s complicated. Moving the tiny pieces from the intestine to blood stream. -> when the body is getting ready to receive food (i. e. , salivating) Digestion starts in the mouth: mechanical digestion. Your teeth break up food: chemical digestion. Enzymes in your saliva start breaking up food. Lingual lipase breaks up fat: making a bolus moist ball of food. -> waves of muscular contractions that move the food. Peristalsis starts in the esophagus and continues all the way through the gi tract. Food moves into the stomach via the lower esophageal sphincter. -> 3 thick muscle laters churn and break up food. Hydrochloric acid (hcl) denatures protein (unravels) ph of gastric juice is 2. 0 (1 is most acidic)
