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365 > digestive system part 3 > Flashcards

digestive system part 3 Flashcards

1
Q

what cells control secretion of gastrin in the stomach

A

G cells

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2
Q

ECF cells function

A

stimulated by gastrin

stimulate parietal cells to release acid

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3
Q

chief cells function

A

stimulated by gastrin

release pepsinogen

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4
Q

enteroendocrine cells of intestine (acid)

A

stimulated by acid
release VIP–> pancreas –> HCO3
release secretin–> liver–> bile

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5
Q

enteroendocrine cells of intestine (digested food)

A

stimulated by digestive products
release CCK–> gallbladder –> bile
OR release CCK–> pancreas–> enzymes

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6
Q

what is energy balance

A

energy balance = food intake - energy expenditure

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7
Q

what is the short term regulation of energy

A

ending individual meals

gherlin, PYY, cholecystokinin (CCK), vagus nerve

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8
Q

long term status of body energy store

A

leptin

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9
Q

what happens when an obese mouse is with a regular mouse

A

the obese mouse will get smaller

- obese mouse has no chemical messengers, receives it from the regular mouse and is able to regulate its appetite

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10
Q

what happens when a diabetic mouse is paired with a regular mouse?

A

the diabetic mouse will stay the same size and regular will starve
- diabetic mouse has no receptors and over produces chemical messenger so regular mouse will stop eating but diabetic mouse has no effect

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11
Q

what happens when diabetic mouse is paired with obese

A

obese mouse will be able to control its eating
- diabetic mouse is unaffected but obese mouse uses chemical messengers from diabetic (doesn’t starve because it has no chemical messangers of its own)

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12
Q

what is the chemical messenger the obese mouse was unable to produce

A

leptin

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13
Q

leptin role

A

suppresses appetite

secreted by white adipose tissue

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14
Q

gherkin

A

stimulates appetite

secreted by stomach when empty

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15
Q

peptide YY

A

suppresses appetite

secreted by colon when full

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16
Q

CCK

A

suppresses appetite

secreted by duodenum

17
Q

what hormones suppress appetite

A

peptide YY, CCK, leptin

18
Q

what hormones stimulates appetite

A

ghrelin

19
Q

where do hormones bind to control appetite

A

arcuate nucleus in the hypothalamus

20
Q

what effects does the activity of neuropeptide Y (NPY) neurons have on appetite

A

stimulates appetite

21
Q

what effects does the activity of pro-opiomelanocortin (POMC) neurons have on appetite

A

inhibits appetite

22
Q

what is the boys starvation response

A 
conserves glucose
muscles shift to lipid metabolism
protein breakdown
amino acids converted to fatty acids and carbs
structural degredation (skeletal muscle)

365 (15 decks)

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