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Digestion
| Question | Answer |
|---|---|
| why do we need digestion | to physically and chemical breakdown of food into soluble particles small enough to pas into body cells. |
| whats absorption | digested food leaves the body and enters the blood |
| what are the 4 types of teeth | incisors,caniines,premolars,molars |
| whats a autotroph | make their own food |
| whats a heterotroph | consumes food |
| whats is peristalisis and what part of body uses it | a wave of muscular action that forces food through different parts of the digestive system. |
| what stimulates peristalisis | dietary fibre |
| what chemical digestionn takes place in the stomach | mixing with gastric juice to make chyme |
| what is chyme | end product of stomach and will pass onto small intestine |
| what is gastric juice made of | 1) Mucus 2)HCL 3) pepsionogen |
| whats pepsinogen | an inactive enzyme which is converted to active nezyme pepsin by HCL,can digest protein into peptides |
| what does the pancreas do | makes hormone insulin which helps cell absorb glucose. |
| which salt neutralises chyme (Pancreas) | sodium bicarbonate |
| give me 2 enzymes which help digestion | amylase (starch-maltose) and lipase (lipids-fatty acids and glycerol) |
| functions of the liver | 1) makes bile which emulsifies fat 2)stores vitamins |
| what does bile consist of | 1) water 2) bile salts 3)bile pigments |
| function of duodenfunction of um | most digestion takes place-chemical |
| function of ileum | absorbs food and nutrients |
| function of villi | increase surface area for absorption of digested food |
| how does villi absorb material | fatty acids and glycerol are absorbed into lacteal,lymph is transported to the bloostream for distribution around the body |
| what cinnects the small intestine to liver | hepatic portal vein |
| what is transported through ileum to liver | absorbed glucose,vitamins and minerals |
| whats deamination | amino acids being broken down in the liver to make urea |
| how are carbohydrates stored in liver | through glycogen |
| colon functions | reabsorbs water,and produce b griup vitamins |
| rectum function | stores faecaes |
| symbitoic bacteria((mutually beneficial relationship) bacteria in the colon | i) makes vitamins,break downs cellulose |
Created by:
jp123456789