lec 1 GI Reflexes

Question 1

Gastrointestinal Reflexes

Answer 1

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

Question 2

Local Reflexes

Answer 2

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

Question 3

Regional Reflexes

Answer 3

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

Question 4

Regional Reflexes example

Answer 4

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

Question 5

gastro-colic reflex

Answer 5

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

Question 6

the entero-gastric reflexes

Answer 6

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

Question 7

the colono-ileal reflex

Answer 7

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

Question 8

Systemic Reflexes:

Answer 8

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

Question 9

Systemic Reflexes include

Answer 9

1. Vagovagal reflex
2. pain reflexes
3. defecation reflexes

Question 10

Vagovagal reflex

Answer 10

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;

Question 11

pain reflexes

Answer 11

Systemic Reflexes

inhibition of the entire GIT

Question 12

defecation reflexes

Answer 12

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