Item 4 Part A How many synapses does a nervous signal have to cross when moving

Question

Item 4 Part A How many synapses does a nervous signal have to cross when moving from an interneuron in the spinal cord to activate an effector organ for the somatic motor division? 0 Synapses 1 Synapse 2 Synapses 3 Synapses 4 Synapses Submit My Answers Give Up Part B How many synapses does a nervous signal have to cross when moving from an interneuron in the spinal cord to activate an effector organ for the sympathetic division of the ANS? 0 Synapses 1 Synapse 2 Synapses 3 Synapses 4 Synapses Submit My Answers Give Up Part C How many synapses does a nervous signal have to cross when moving from an interneuron in the spinal cord to activate an effector organ for the parasympathetic division of the ANS? 0 Synpases 1 Synapse 2 Synapses 3 Synapses 4 Synapses Submit My Answers Give Up

Explanation / Answer

A) The nervous signal when moving from an interneuron in the spinal cord to activate an effector organ for the somatic motor division have to cross only one synapse. This is because somatic motor neurons does not have any ganglion.

B) The nervous signal when moving from an interneuron in the spinal cord to activate an effector organ for the sympathetic nervous division have to cross two synapses.

C) Similarly, the nervous signal when moving from an interneuron in the spinal cord to activate an effector organ for the parasympathetic division have to cross two synapses.

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