Question

when comparing the somatic nervous system (sns) to the autonomic nervous system (ans), which of the following statements is false?
afferent (sensory) information in the sns is processed in the central nervous system, but afferent information in the ans is processed in ganglia.
the effectors of the sns are skeletal muscles, while those of the ans are visceral organs.
the axon of a visceral motor neuron in the ans in the cns innervates another neuron in a ganglion, which innervates the effector organ. in the sns, the somatic motor neuron in the cns directly contacts the effector organ.
both have afferent and efferent neurons.
i dont know yet

Explanation:

• For the first option: In the SNS, afferent (sensory) information is processed in the central nervous system (CNS). In the ANS, afferent information is also processed in the CNS, not just ganglia. Ganglia in the ANS are mainly related to efferent (motor) pathways (relaying motor signals from CNS to effectors). So this statement is false.
• For the second option: The somatic nervous system (SNS) controls skeletal muscles (voluntary movement), and the autonomic nervous system (ANS) innervates visceral organs (involuntary functions like heart rate, digestion), so this is a true statement.
• For the third option: In the ANS, there is a two - neuron chain (preganglionic neuron from CNS to ganglion, then postganglionic neuron from ganglion to effector). In the SNS, a single motor neuron from CNS directly innervates skeletal muscle (effector), so this is a true statement.
• For the fourth option: Both SNS and ANS have afferent (sensory, bringing information to CNS) and efferent (motor, taking information from CNS) neurons. The SNS has somatic sensory and somatic motor neurons. The ANS has visceral sensory (afferent) and visceral motor (efferent) neurons, so this is a true statement.

Answer:

Afferent (sensory) information in the SNS is processed in the central nervous system, but afferent information in the ANS is processed in ganglia.