Question

multiple choice question
which nervous system transmits only excitatory signals to effector cells?
somatic nervous system
autonomic nervous system
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Explanation:

The somatic nervous system is responsible for voluntary movements. It transmits excitatory signals to skeletal muscles (effector cells) to cause contraction. The autonomic nervous system can have both excitatory and inhibitory effects on its effector cells (such as smooth muscle, cardiac muscle, and glands). For example, in the autonomic nervous system, the parasympathetic division can slow the heart rate (inhibitory) while the sympathetic division can increase it (excitatory).

Answer:

Somatic nervous system