Integrative review Flashcards

0
Q

Myenteric nerve plexus

A

Receives input from lumenal mechanoreceptors Part of enteric nerve system Not going to stimulate secretion

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1
Q

How does hepatic vein differ from portal vein?

A

It has direct access to IVC

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2
Q

Portal vein, splenic vein, superior mesenteric vein, and inferior mesenteric vein all go through what before going to IVC?

A

Liver!

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3
Q

Vagus does not affect:

A

Salivation

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4
Q

Vagus does what in the GI?

A

-Stimulates gastric proton pump -Increases lower intestinal motility -Stimulates liver bile production -Relaxes sphincter of Oddi

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5
Q

Sympathetic input to foregut and midgut:

A

Greater, lesser, least splanchnic nerves

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6
Q

Sympathetic input to hindgut

A

Lumbar splanchnic

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7
Q

Main type of motility found in colon?

A

Segmental propulsion - not caused by circular muscle but caused by teniae coli -mass movement occurs as well, mass movement occurs over short bursts of time

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8
Q

Types of motility in small intestine:

A

Segmentation and peristalsis

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9
Q

Segmental propulsion vs. segmentation

A

Segmental propulsion caused by teneia coli

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10
Q

Branch of inferior mesenteric vein?

A

Left colic vein

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11
Q

Slow waves in the GI tract:

A

Resting membrane potential in the GI tract undulates in the GI tract, when you depolarize above -40 mV —> get spike potentials Depolarization occurs by parasympathetics

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12
Q

LES is controlled by

A

Enteric nerves

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13
Q

Ability of stomach to relax in response to food is

A

Vagal nerves

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14
Q

Greater splanchnic nerves

A

Foregut

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15
Q

Lesser splanchnic nerves

A

midgut

16
Q

Lumbar splanchnic nerves

A

Hindgut

17
Q

What will slow the rate of gastric emptying after a meal?

A

CCk

18
Q

Hyperpolarization of GI tract causing relaxation

A

NO, Norepinephrine, VIP

19
Q

Presence of acid in the duodenum does what?

A

Increases pancreatic buffer production