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Anatomy and Physiology I > 3.4 Physiology of the GI Tract Part 2 > Flashcards

3.4 Physiology of the GI Tract Part 2 Flashcards

1
Q

What is the purpose of the low pH in the stomach?

A

kill bacteria
inactivate salivary amylase
activation of pepsinogen

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2
Q

What secretes pepsinogen?

A

chief cells in the stomach

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3
Q

What is pepsinogen?

A

pro-enzyme

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4
Q

What is the active version of pepsinogen?

A

pepsin

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5
Q

What accomplishes the mechanical digestion in the stomach?

A

muscularis externa

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6
Q

What controls the release of chyme into the duodenum?

A

pyloric sphincter

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7
Q

Where does absorption begin?

A

small intestine

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8
Q

Where does the digestion of fats begin?

A

small intestine

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9
Q

What can the enzymes of the pancreatic juices digest?

A

starch
fats
proteins

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10
Q

What breaks down peptides into amino acids in the small intestine?

A

peptidases

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11
Q

What digests maltose and what is it broken down into?

A

maltase; glucose

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12
Q

What are the enzymes included in pancreatic juice?

A

amylase
trypsin
lipase

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13
Q

What is contained in the pancreatic juice and what does it do to chyme?

A

bicarbonate
neutralizes chyme

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14
Q

What two hormones does chyme stimulate the small intestine to secrete?

A

cholecystokinin
secretin

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15
Q

What is the purpose of CCK?

A

causes the gallbaldder to secrete bile

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16
Q

What is the purpose of secretin?

A

causes the liver to secrete bile

17
Q

What does bile do?

A

breaks down fats into smaller pieces
necessary for the absorption of fats

18
Q

When is digestion complete?

A

when food reaches the end of the small intestine

19
Q

What remains by the time chyme has reached the end of the small intestine?

A

bacteria
undigested food
water

20
Q

What is absorbed in the large intestine?

A

water
vitamins
minerals

21
Q

What is produced in the large intestine?

A

vitamin K
some B vitamins

Anatomy and Physiology I (89 decks)

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