NUTR 2050 Lecture Notes - Lecture 2: Filet Mignon, Salad, Baked Potato
17 May 2017
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1,2,3,4 chapters for midterm up to carbo hydrates. Goals for today: be familiar with organs of digestive tract and what they do, describe where/how digestion happens, friday is about absorption and elimination. 3 functions: digestion, breaking food into tiny pieces, absorption, moving tiny pieces from the inside of your intestines in blood stream, excretion, getting rid of the waste. Nervous system- stomach/intestines send nerve signals to the hypothalamus of the brain. Blood sugar levels drop- insulin and glucagon levels in the blood change (hormones); this is the signal to the hypothalamus. Epiglottis blocks airways or directs food into the espphagus. In the esophagus: persistalsis, waves of msucle that move food. Inner circular muscles: outer length-wsie muscles, starts in esophagus and continues all the way through your gi tract, food moves into the stomach via the lower esophageal sphincter week 2.
