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compare characteristics of skeletal and smooth muscle fiber contraction

compare characteristics of skeletal and smooth muscle fiber contraction
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Answer #1
SKELETAL MUSCLE SMOOTH MUSCLE
  • Innervated by somatic nervous system.
  • Their contractions are not affected by hormones.
  • Nerve that syanpse the muscle can be inhibited
  • Neurotransmitter at neuromuscular junction are nicotinic cholinergic receptors.
  • Stimulus generates AP on muscle membrane which cause release of Ca2+ from the sarcoplasmic reticulum.
  • Innervated by autonomic nervous system
  • Stimulus can be from neurotransmitter or hormone.
  • Neurotransmitters use muscarinic or adrenergic receptors.
  • Ca2+ for contraction comes from outside the cell or endoplasmic reticulum.
  • Unlike skeletal muscles, they can remain contracted for a longer period
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