Question

sympathetic nerve fibre in mammals arise from
(1) thoracolumbar nerves
(2) III , IV , X cranial nerve
(3) sacral nerves
(4) cervical nerves​

Answer 1

Answer:

Sympathetic nerves are composed of efferent fibres derived from the thoracic and lumbar regions of the spinal cord. It activates the involuntary action. It is also known as fight or flight. The post ganglion which originates from the sympathetic chain innervates the effector organ and effect it.