lec 1 GI Reflexes Flashcards

1
Q

Gastrointestinal Reflexes

A
  1. Local Reflexes
  2. Regional Reflexes
  3. Systemic Reflexes
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2
Q

Local Reflexes

A
  1. entirely within the gut wall ENS
    2.control: secretion,
    peristalsis,
    mixing contractions,
     local inhibitory effects
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3
Q

Regional Reflexes

A

from the gut ► the pre-vertebral sympathetic ganglia ►back to the gastrointestinal tract
2. long distances

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4
Q

Regional Reflexes example

A
  1. gastro-colic reflex
  2. the entero-gastric reflexes
  3. the colono-ileal reflex r
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5
Q

gastro-colic reflex

A

Regional Reflexes from the stomach to cause evacuation of the colon,

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6
Q

the entero-gastric reflexes

A

Regional Reflexes from the colon and small intestine to inhibit stomach
motility and stomach secretion

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7
Q

the colono-ileal reflex

A

Regional Reflexes from the colon to inhibit emptying of ileal contents into the
colon

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8
Q

Systemic Reflexes:

A

from the gut ► the spinal cord or brain stem ► then back to the
gastrointestinal tract

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9
Q

Systemic Reflexes include

A
  1. Vagovagal reflex
  2. pain reflexes
  3. defecation reflexes
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10
Q

Vagovagal reflex

A

Systemic Reflexes
from the stomach and duodenum brain stem  back to the stomach—by way of the vagus nerves (vagus do have afferent sensory and efferent motor) to control gastric motor and secretory activity;

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11
Q

pain reflexes

A

Systemic Reflexes

inhibition of the entire GIT

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12
Q

defecation reflexes

A

Systemic Reflexes
travel from the colon and rectum spinal cord produce the powerful colonic, rectal, and abdominal contractions required for defecation (the defecation
reflexes

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