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GI Physiology > Gastric motility and pancreatic function > Flashcards

Gastric motility and pancreatic function Flashcards

1
Q

Where do peristaltic waves move from along the stomach?

A

From the body to the antrum

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2
Q

Does the body of the stomach have thick or thin muscle? How strong are the contractions?

A

The body has thin muscle and the contractions are weak

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3
Q

Does the antrum have thin or thick muscle? How strong are the contractions?

A

The antrum has thick muscle and the contractions are strong

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4
Q

How is the peristaltic rhythm generated?

A

By pacemaker cells

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5
Q

What is the slow wave rhythm also known as?

A

BER

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6
Q

What does BER stand for?

A

Basic electrical rhythm

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7
Q

What are the slow waves conducted through?

A

Gap junctions along the longitudinal muscle layer

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8
Q

What determines the strength of contraction?

A

Number of action potentials per wave

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9
Q

What hormones increase contraction of the stomach?

A

Gastrin

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10
Q

What inhibits motility in the duodenum?

A

Fat
Amino acids
Hypertonicity

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11
Q

What do brunners glands secrete?

A

Bicarbonate

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12
Q

In which layer are brunners glands located?

A

In the submucosal layer

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13
Q

What does acid in the duodenum trigger?

A

Long(vagal) and short(ENS) reflexes- HC03 secretion

Release of secretin from s cells- HC03 from pancreas and liver

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14
Q

What is within pancreatic islets of the endocrine portion?

A

Insulin
Glucagon
Somatostatin

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15
Q

What is in the exocrine portion of the pancreas?

A

Acinar cells are in the exocrine portion

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16
Q

What are lobules connected by?

A

Interlobular discs

17
Q

What is the exocrine pancreas responsible for?

A

Digestive function of the pancreas

18
Q

What do duct cells secrete?

A

Bicarbonate

19
Q

What do acinar cells secrete?

A

Digestive enzymes

20
Q

What do zymogens prevent?

A

The autodigestion of the pancreas

21
Q

What converts trypsinogen to trypsin?

A

Enterokinase

22
Q

What converts zymogen to the active form?

A

Trypsin

23
Q

Why is secretin released?

A

Due to acid in the duodenum

24
Q

What does secretin stimulate the release of?

A

Bicarbonate

25
Q

What stimulates zymogen secretion?

A

Cholecystokinin

26
Q

What is cholecystokinin released in response to?

A

Fat or amino acids in the duodenum

GI Physiology (6 decks)

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