Digestion 2 Flashcards

1
Q

what phases can regulation of the stomach be divided into

A

cephalic, gastric, and intestinal phases

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2
Q

describe what happens during cephalic regulation

A

thinking or smelling food

secretion of acid happens sometimes even before food enters the mouth

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3
Q

why does secretion of acid happen sometimes before food enters the mouth

A

stomach churns due to habituation of getting food

due to vagus nerve and parasympathetic (long reflex)

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4
Q

what is an example of something that triggers cephalic regulation

A

depression can cause loss of appetite and inhibit digestion

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5
Q

describe when gastric regulation occurs

A

several hairs after eating food

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6
Q

describe what happens during intestinal regualtion

A

occurs in the intestines
primarily inhibits digestion due to enough food in intestine (slows food emptying)
gastric inhibitory peptide

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7
Q

what does the stomach act as a gatekeeper for

A

intestine

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8
Q

what does it mean for the stomach to be a gatekeeper for intestine

A

prevent intestine from having too much food at once

stomach has ability to store food for a little bit unlike intestine

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9
Q

why do you not want to overload intestine

A

it is where absorption happen

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10
Q

how often does small bolus go into the small intestine

A

every 3 minutes

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11
Q

what is suited for chemical digestion and absorption

A

small intestine

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12
Q

what does the small intestine have a large amount of

A

surface area due to the layers of folding

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13
Q

what finger like projection is on each fold of the small intestine

A

villi

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14
Q

what does the villi do

A

creates surface area

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15
Q

what grabs amino acids and transports them across membrane into the blood

A

absorptive cells

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16
Q

what do the goblet cells do

A

secretes mucus to get food liquefied and moving along

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17
Q

what has a rich blood supply

A

interior of villus

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18
Q

where does digestion of proteins begin and end

A

begins in the stomach and is completed in the small intestine

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19
Q

what is the enzyme of the stomach that breaks down protein

A

pepsin

20
Q

what enzymes are found in the lumen of the small intestine

A

pepitadases and trypsins

21
Q

what do pepitadase and trypsin send to the brush border enzymes on epithelium

A

short trains of amino acids(2 or 3)

22
Q

what happens at the brush border in the digestion of proeins

A

finish the job, take short train and split the bonds

then amino acids are immediately absorbed in the blood

23
Q

where does digestion of carbohydrates begin and end

A

begins in the mouth and ends in the small intestine

24
Q

the digestion of what is water soluable

A

proteins

25
Q

what enzyme in the stomach breaks down carbohydrates

A

no enzymes in stomach

26
Q

what breaks down carbohydrates

A

salivary amylase

27
Q

what is found in the lumen of the small intestine that helps break down carbohydrates

A

intestinal amylase

28
Q

do the brush border enzymes have the same function in the digestion of proteins and carbohydrates

A

yes, in both they finish the job of breaking down and absorb the subsequent sugars and amino acids into the blood

29
Q

where does digestion of lipids occur and what is it facilitated by

A

it occurs in the intestine and is facilitated by bile

30
Q

what is the function of the digestion of lipids

A

process to break apart big globs of fat

31
Q

the digestion of what is not water soluable

A

lipids

32
Q

what allows for the emulsification of fats

A

bile

33
Q

what allows chemical digestion by lipases

A

emulsification of fats

34
Q

what does fatty chyme release

A

CCK

35
Q

what coordinates fat digestion

A

CCK

36
Q

liver releases bile to the _______

A

gallbladder

37
Q

what stimulates the gall bladder to release bile

A

CCK

38
Q

this is the break down of large flat globules into small droplets

A

emulsification

39
Q

what do lipases chemically digest lipid into

A

fatty acids and glyceral

40
Q

where are fatty acids and glyceral absorbed into

A

lymph lacteal for drainage

41
Q

what neutralizes the acidic chyme in the small intestin

A

secretin

42
Q

whats main target is the pancreas

A

secretin

43
Q

what does the pancreas do

A

secretes enzymes and HCO3 into the small intestine

makes products that small intestine needs for digestion

44
Q

what does the pancreas facilitate and how

A

digestion in small intestine by secreting bicarbonate(pH8) which is stimulated by secretin

45
Q

how long does the pancreas continue to make bicarbonate

A

until the chyme is neutralized to pH7 int the duodenum

46
Q

what are the enzymes of digestion for the duodenum stimulated by

A

CCK