Digestion

Front 1

whats the order of the alimentry canal?

Back 1

mouth cavity, oesphagus, stomache, small intestine, large intestine, anus

Front 2

what is the role of tasting?

Back 2

excepting or rejecting food

Front 3

what does the mouth do?

Back 3

mechanically broken down - teet

Front 4

is there chemical digestion

Back 4

yes - salivary amalyse

Front 5

what is involved in swallowing?

Back 5

• result of a number of coordinating reflexinitiated when food is pushed backwards to touch the back of the pharynx
• when you Swallow you trigger a reflex; at theback of the throat the food passage crosses the airway between the nose and thelungs, swallowing causes the reflex opening of both upper and lower oesophagealsphincter to receive the food. At the same time the soft palate and epiglottismove to prevent food entering the airways this is also a reflex thatautomatically prevents breathing during swallowing

Front 6

what does the oesophagus transport?

Back 6

food by peristalisis from omuth to stomach

Front 7

what is perisalsis

Back 7

peristalsis is the muscular squeezing of theoesophagus that pushes the food down into the stomach - mechanical

Front 8

what is the stomache important as?

Back 8

food stroage organ

Front 9

what happenswhilst food is stored in stomache?

Back 9

turns into chyme - semi soft mixture - mechsnical churning and chemical breakdown

Front 10

what is released by the stomache walls?

Back 10

hcl, pepsinogen, gastric lipase

Front 11

how does pepsinogen get to pepsin

Back 11

hcl spilts pepsinogen - thendigestion of protein into peptides

Front 12

what does gastric lipase do?

Back 12

begins the digestion of fats into fatty acids and glyercol

Front 13

what characterisitcs of the small intestine make it good for the excahnge and diffusion

Back 13

large surface area - villi, weel supplied with blood and lympatic vessel

Front 14

how does it work

Back 14

• small amounts of chyme are released intermittently from the stomach
• takes 2 - 4 hours
• recieves pancreatic enzymes - bile from liver 2 emulsify fat
• intestinal enzymes secreted through the lining
  

Front 15

why is bile put into intestines?

Back 15

bile is alkaline it neutralises the acid fromthe stomach and produces a favourable pH for the duodenal Enzymes,

Front 16

what do the duodenal Enzymes do?

Back 16

these enzymes complete the digester ofcarbohydrates into simple sugars, proteins into amino acids and fats into fattyacids and glycerol

Front 17

what is abosrbed and by what?

Back 17

active transport - · the absorption of amino acids simple sugarsvitamins minerals involves active transport waste· water enter the small intestine is also absorbedby osmosis

Front 18

what happens in the large intestine

Back 18

further absorption - · salts are actively absorbed and water followspassively along the osmotic gradient no digestive enzymes secreted

Front 19

what the remainder of the colon and the rectum areinvolved i. and characteristics that make it easier

Back 19

• storing faeces
• · the walls are thinner and more easily stretchedproviding a large capacity storage