Question

In human, autonomic nervous system is composed of

• A. Sympathetic and parasympathetic nerves
• B. Cranial and spinal nerves
• C. Brain and spinal nerves
• D. Medulated and non medulated nerves

Answer 1

Answer: (A)

Sympathetic and parasympathetic nerves

In Humans, the autonomic nervous system is composed of the sympathetic nervous system (SNS) and parasympathetic nervous system (PNS).

They have antagonistic (opposite) effects on the internal organs they innervate.

The SNS is activated during critical situations, like fight or flight responses and consists of motor neurons that stimulate skeletal muscles. PNS is activated whilst at rest, such as during food digestion after eating and it consists of motor neurons that control smooth muscles, cardiac muscles, and glands. Hence option A is correct.