Intestines Flashcards

1
Q

what are the secretions of brunner’s glands? function?

A
  1. mucus, bicarb 2. protect mucosa, neutralize acid
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2
Q

what are the secretions of the crypts of lieberkuhn? function?

A
  1. mucus, water, electrolytes, peptidases, sucrase, maltase, lactase, lipase, transporters 2. lubricate, absorb, digest
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3
Q

what are the primary regulators of GI smooth muscle?

A
  1. Ach (stimulate contraction) 2. VIP (inhibit contraction) 3. NO (inhibit contraction)
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4
Q

what are the three types of intestinal motility?

A
  1. MMC 2. segmental contractions 3. peristaltic contractions
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5
Q

what is the main stimulus for peristaltic contractions in the small intestine?

A

distension

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6
Q

in the large intestine, what stimulus is responsible for relaxation?

A

sympathetic stimulation

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7
Q

what are the four key features of the defecation reflex?

A
  1. intrinsic 2. parasympathetic 3. additional afferent signals 4. desired defecation
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8
Q

what mediates the intrinsic reflex of defecation?

A

ENS

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