349
edits
Changes
Muscles - Anatomy & Physiology (view source)
Revision as of 14:21, 29 August 2008
, 14:21, 29 August 2008→Smooth Muscle
[[Image:Smooth Muscle 1.jpg|thumb|right|150px|Smooth muscle - Copyright RVC 2008]]
[[Image:Smooth Muscle 1.jpg|thumb|right|150px|Smooth muscle - Copyright RVC 2008]]
*Slower contraction and relaxation
*Slower contraction and relaxation
**Undeveloped sarcoplasmic reticulum means that smooth muscle depends on the plasmalemma release of Ca: affects contractile prpperties
**Undeveloped sarcoplasmic reticulum means that smooth muscle depends on the plasmalemma release of Ca: affects contractile properties
*Smooth muscle lacks troponin
*Smooth muscle lacks troponin
*Control of smooth muscle contraction involves '''thin and thick filament regulation'''
*Control of smooth muscle contraction involves '''thin and thick filament regulation'''
*'''Single Unit''': myogenic contraction; depolarized by gap junctions; eg. intestinal smooth muscle
*'''Single Unit''': myogenic contraction; depolarized by gap junctions; eg. intestinal smooth muscle
*'''Multi-unit''': neurogenic contraction; no gap junctions; eg. iris
*'''Multi-unit''': neurogenic contraction; no gap junctions; eg. iris
==Cardiac Muscle==
==Cardiac Muscle==