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Muscles - Anatomy & Physiology (view source)

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[[Image:Smooth Muscle 1.jpg|thumb|right|150px|Smooth muscle - Copyright RVC 2008]]

*Slower contraction and relaxation

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**Undeveloped sarcoplasmic reticulum means that smooth muscle depends on the plasmalemma release of Ca: affects contractile ~~prpperties~~

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**Undeveloped sarcoplasmic reticulum means that smooth muscle depends on the plasmalemma release of Ca: affects contractile properties

*Smooth muscle lacks troponin

*Control of smooth muscle contraction involves '''thin and thick filament regulation'''

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*'''Single Unit''': myogenic contraction; depolarized by gap junctions; eg. intestinal smooth muscle

*'''Multi-unit''': neurogenic contraction; no gap junctions; eg. iris

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==Cardiac Muscle==

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