Muscle Types
- Created by: BioFreakinomics
- Created on: 11-03-16 10:42
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- Muscle Types
- Involuntary (smooth) Muscle
- Controlled by autonomic NS
- Contracts slowly & fatigues slowly
- Short spindle shaped cells, each with a single nucleus
- Unstriated appearance under microscope
- Found in intestine walls, iris, arteries, arteriols, cervix & bronchi
- Involved in movement of materials along internal tubes such as gut
- Involved in autonoimic reflexes such as pupil dilation / constriction
- Cardiac Muscle
- Controlled by autonomic NS but is myogenic
- Contracts quickly but does not fatigue
- Roughly quadrangular shaped, with branched fibres
- Have a single central nucleus
- Striated appearance under microscope
- Involved in pumping around the body
- Voluntary (skeletal) Muscle
- Controlled by somatic NS
- Contracts quickly & fatigues quickly
- Branched cylindrical fibres which are found in the locomotive system
- Have multinucleate cells
- Striated appearance under microscope
- Involved in voluntary movement of bones of the skeleton about the joints
- Involuntary (smooth) Muscle
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