GI physiology Flashcards

1
Q

what digests in the mouth

A

starch (mechanical)

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2
Q

what enzyme is in the mouth

A

ptyalin: salivary amylase

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3
Q

what glands are in the mouth

A

parotid, submandibular, sublingual

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4
Q

function of the esophagus

A

transport

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5
Q

what cells are in the esophagus

A

mucus cells

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6
Q

what digests in the stomach

A

protein

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7
Q

what enzyme digests collagen

A

pepsin

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8
Q

what cells are in the stomach

A

chief cells, g cells, parietal cells (oxynitic cells)

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9
Q

what do chief cells secrete

A

pepsinogen

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10
Q

what cell secretes gastrin

A

g cells

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11
Q

what cells secreate HCL and intrinsic factor

A

parietal cells

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12
Q

what is the purpose of rugae

A

increase surface area

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13
Q

what is pernicious anemia

A

damage to mucosa

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14
Q

what happens in the duodenum

A

fat digestion and starch digestion

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15
Q

what enzymes are in the duodenum

A

pancreatic lipase and amylase

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16
Q

what cells are in the duodenum and what do they secrete

A

brunners cells

secretes alkaline mucus

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17
Q

where is the sphincter of oddi located

A

duodenum

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18
Q

what additional contents are in the duodenum

A

cck, bicarbonate

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19
Q

how long is the duodenum

A

10-12inches

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20
Q

function of jejunum

A

peptide, dissacharide digestion and absorption

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21
Q

what enzyme is in the jejunum

A

carboxy-peptidase

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22
Q

where does carboxy-peptidase come from

A

pancreas

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23
Q

where is most food digestion completed

A

jejunum

24
Q

where in the intestine is there major reabsorption of water

A

jejunum

25
Q

how are amino acids absorbed in the jejunum

A

with glucose transport

26
Q

how long is the jejunum

A

6-10 feet

27
Q

function of ileum

A

reabsorption of bile b12

28
Q

what cells are in the ileum

A

peyers patches - lymphoid tissue

29
Q

how long is the ileum

A

10-15 feet

30
Q

small intestine function

A

carbs, protein and lipid digestion

31
Q

what inhibits gastric emptying

A

food in small intestine

32
Q

contents of small intestine

A

crypts of lieberkuhns, brush border, plicae circulares, goblet, paneth, and argentaffin cells

33
Q

what enzymes are in the small intestine

A

carboxypeptidase, aminopeptidase, dipeptidase, peptidase, dextrinase, glucoamylase, maltase

34
Q

how long is the small intestine

A

20-25ft

35
Q

gall baldder function

A

stores and concentrates bile

36
Q

what forms common bile duct

A

cystic duct and common hepatic duct

37
Q

where does the common bile duct empty into

A

duodenum

38
Q

what enzymes are in the gall bladder

A

LDH, SGPT, SGOT, arginase, alkaline phosphatase

39
Q

what causes bile from gall bladder to empty into the duodenum

A

cck

40
Q

what does cck also do

A

inhibit gastric emptying

41
Q

function of pancreas

A

digestive enzymes and produce the hormones insulin and glucagon

42
Q

what enzymes are in the pancreas

A

pancreatic liapse, amylase, trypsin, chymotrypsin, insulin and glucagon

43
Q

what releases bicarbonate juice

A

secretin

44
Q

what does cck release in the pancreas

A

enzyme-rich juice

45
Q

colon function

A

water reabsorption and electrolytes

46
Q

cells in colon

A

paneth cells (kills bacteria)

47
Q

colon contents

A

bacteria, taenia coli (muscle)

48
Q

how long does it take for food to go through duodenum

A

2-4 hours

49
Q

how long does it take for food to go through colon

A

3-4 days

50
Q

rectum function

A

storage for elimination

51
Q

rectum contents

A

no taenia coli, columns of morgagni

52
Q

what part of the gi can have cancer

A

rectum, recto-sigmoid area

53
Q

function of liver

A

produces, stores and filters (makes bile) (kupffer cells)

54
Q

what cells are in the liver

A

hepatocyte cells

55
Q

what do hepatocyte cells do

A

detoxify, process fats and amino acids, vitamin storage, makes blood proteins

56
Q

damage to the liver

A

decrease lipid digestion, synthesis, and blood sugar regulation