GI Part 8- 1 Flashcards

1
Q

What GI reflex is:
Signals from the stomach that causes evacuation of the colon

A

Gastrocolic

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2
Q

What GI reflex is:
Signals from the colon and small intestine
Inhibit stomach motility and stomach secretion

A

Enterogastric reflex

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3
Q

What GI reflex is:
Signals from the colon that inhibit emptying of ileal contents into the colon

A

Colonileal

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4
Q

The gastrocolic, enterogastric, and colonieleal reflex are from the gut to the __________ sympathetic ganglia, then back tot he GI tract?

A

Prevertebral

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5
Q

Reflexes that are entirely within the ____ _____:
Control of GI secretion, peristalsis, formation of mixing contractions, local inhibitory effects, etc

A

Gut wall

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6
Q

Reflexes from the gut to the _____ ______ or _______ and then back to the GI tract:
Control gastric motor and secretory activity
Pain reflexes
Defecation reflex

A

Spinal cord
Brainstem

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7
Q

What reflex is STRETCHING of the intestinal wall during the passage of a bolus triggers a reflex?

A

Peristaltic

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8
Q

STRETCHING of the intestinal wall during the passage of a bolus triggers a reflex that constricts the lumen behind the bolus and dilates the lumen ahead of it —> coordination of longitudinal and circular musculature —> ________ movement of chyme

A

Propulsive

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9
Q

What is a property of many syncytial smooth muscle cells (bile duct, ureters)?

A

Peristalsis

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10
Q

Simulation at any point in the gut can cause a ________ ring to appear in the circular muscle spreading them along the gut tube

A

Contractile

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11
Q

Behind the site of distention =
Longitudinal muscle _______
Circular muscle ______

A

Relaxes
Contracts

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12
Q

Distal to the site of distention=
Longitudinal muscle ________
Circular muscle ________

A

Contracts
Relaxes

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13
Q

What do excitatory motor neurons release (2)?

A

ACh and SP

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14
Q

ACh and SP = __________ of circular muscle behind the chyme and ___________ of longitudinal muscle after the chyme

A

Contraction x2

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15
Q

What type of motor neurons are NO, ATP, and VIP?

A

Inhibitory

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16
Q

NO, ATP, VIP = __________ of longitudinal muscle behind the chyme and ___________ of circular muscle after the chyme

A

Relaxation x2

17
Q

What reflex refers to the GI tract reflex where afferent and efferent fibers of the vagus nerve coordinate responses to gut stimuli via the dorsal vagal complex in the brain?

18
Q

Vagovagal reflex:
The __________ relaxation of the stomach in response to mastication of food and deglutition