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Small Intestine - Anatomy & Physiology
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Revision as of 13:30, 10 July 2008
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13:30, 10 July 2008
→Regulation & Control
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**Sympathetic innervation antagonises the parasympathetic nervous system and inhibits motility and secretion.
**Sympathetic innervation antagonises the parasympathetic nervous system and inhibits motility and secretion.
*Generation of action potentials is intrinsic to the smooth muscle in the intestine.
*Generation of action potentials is intrinsic to the smooth muscle in the intestine.
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**'''Interstitial cells of Cajal''' act as muscle pacemakers and generate a ''basic electrical rhythm''(BER).
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**'''Interstitial cells of Cajal''' act as muscle pacemakers and generate a ''basic electrical rhythm'' (BER).
**The BER is able to pass between cells due to the presence of gap junctions. The muscle therefore acts as a syncytium.
**The BER is able to pass between cells due to the presence of gap junctions. The muscle therefore acts as a syncytium.
**Some BER are sufficient to generate an action potential.
**Some BER are sufficient to generate an action potential.
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*
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Food in the intestine stimulates peristalsis to occur, and increases the likelihood of an action potential occuring.
==Lymphatics==
==Lymphatics==
Shamilton
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