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Biology: Digestion

The Digestive System

QuestionAnswer
how do enzymes speed up digestion? speed up process by lowering activation energy required
amylase: source, substrate, product, optimum pH salivary glands,starch,maltose, 6.5-7.5
pepsin: source, substrate, product, optimum pH gastric glands,protein,polypeptides, 2
lipase: source, substrate, product, optimum pH pancreas,triglyceride,fatty acids + glycerol, 7
what does HCL secreted in the stomach do? provides 2.0 pH, kills any bacteria, prevents food poisening,
main function of small intestine is --through-- absorption through villi
what does the colon do? removes undigested food, forms faeces, absorbs water
which comes first? absorption or assimilation? absorption
what is assimilation? when food particles become part of the tissue. use of food
microvili have special protein channels and pumps in their membranes to absorb nutrients through (2 processes) facilitated diffusion and active transport
villi is one layer thick (epithelial layer) so that rapid diffusion
epithelial layer of villi contains mitochondria to produce ATP for (process) active transport
what does lacteal branch in the middle of villus do? carry away fats after absorption
Created by: milanjcater
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