Involuntary smooth muscle

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  • Created by: alice
  • Created on: 21-02-13 00:20
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  • Involuntary (smooth) muscle
    • Found in walls of intestine, iris, wall of arteries and around arterioles
      • Controls light intensity entering eye
      • Peristalsis- moves food along intestine
      • Controls blood flow
    • Innervated by neurones of the autonomic nervous system
    • Spindle-shaped
      • 500 µm long
      • 5 µm wide
    • Contraction is relatively slow, muscle tires very slowly
    • Contain small bundles of actin and myosin, also a single nucleus


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