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BMSC208 > GI 6 > Flashcards

GI 6 Flashcards

1
Q

Activation of most pancreatic zymogen depends on

A

Trypsin

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2
Q

Sources of regulation in the intestinal phase

A

Acidity
Fat
Amino acids
Hypertonicity
Distension

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3
Q

When substances move into intestine what happens in the stomach

A

Reduced motility and secretions in the stomach

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4
Q

What is intestinal motility influenced by

A

ENS neurons (Myenteric plexus)

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5
Q

Segmental contraction

A

mixing food

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6
Q

Peristaltic Contractions

A

Responsible for forward motion

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7
Q

Mo cells

A

Secrete motion
Possibly stimulated by alkaline pH

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8
Q

Accessory secretion are _________

A

Long reflexes

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9
Q

Types of GI peptides

A

S cells, I cells, K cells, L cells

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10
Q

S cells

A

Secretin

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11
Q

I cells

A

CKK

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12
Q

K cells

A

Glucose dependent insulinotropic peptide (GIP)

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13
Q

l CELLS

A

Glucagon like peptide 1 (GLP-1)

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14
Q

When do pancreatic secretions start

A

Cephalic phase and Gastric phase

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15
Q

what are associated with pancreatic secretions

A

Gastrin and parasympathetic neurons

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16
Q

enteropancreatic reflex

A
  1. Small intestine influencing the pancreas
17
Q

S cells

A

Secretin secreted from S cells
Stimulated by acid coming in from duodenum

18
Q

Role of S cells

A

Stimulates bicarbonate secretion from pancreas
(Lots of bicarbonate to regulate acid in the stomach)

19
Q

Secondary mechanism of S cells

A

Stimulated bile secretion from liver
Inhibit of the Gastric acid secretion and gastric motility

20
Q

Carbohydrates are primarily absorbed by

A

Monosaccharides

21
Q

I cells

A

Cholecystokinin (CKK)
Stimulated by the presence of fatty acids and amino acids in chyme

22
Q

Primary role of I cells

A

Regulates pancreatic enzyme secretion

23
Q

Secondary role of I cells

A

Regulates bile secretion

24
Q

K cells and L cells

A

Gastro inhibitory peptides
Glucagon like peptide
Glucose homeostais
Promotes production of insulin
Insulin is secreted in the pancreas
Inhibit gastric acid secretion and motility

25
Q

Major role of Large intestine

A

Store and concentrate fecal matter

26
Q

Gastroileal reflex

A

Relaxation of ileum
Food in stomach

27
Q

Appendix

A

store gut bacteria

28
Q

Large intestine lacks _____

A

Villi

29
Q

Secretions in large intestine

A

Minimal

30
Q

Digestion in large intestine

A

Zero digestion
But bacteria is digested in the large intestine

31
Q

Motility in large intestine

A

Very slow
Slow segmental contractions
Haustral rolling of churning
mass peristalsis (me)

32
Q
A

BMSC208 (20 decks)

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