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what is the purpose of motor nerve varicosities as they relate to smooth muscle?

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Neuroeffector junctions are varicosities where motor neurons release neurotransmitters to non-neuronal target cells.  These junctions can be observed along the axon.

  • The motor nerve varicosities RELEASE neurotransmitters onto smooth muscle cells.

  • There are many varicosities along the axons of the neurons that feed smooth muscle cells.

  • When autonomic neurons are stimulated, varicosities release neurotransmitters along their axons.

  • These neurotransmitters then diffuse through the interstitial fluid to interact with receptors in the smooth muscle cells.

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