MEDICAL PHYSIOLOGY

Detailed explanation-1: -Motor neurons are a specialized type of brain cell called neurons located within the spinal cord and the brain. They come in two main subtypes, namely the upper motor neurons and the lower motor neurons. The upper motor neurons originate in the brain and travel downward to connect with the lower motor neurons.

Detailed explanation-2: -Specifically, motor neurons exit the spinal cord through the ventral roots and will join together to form spinal nerves. On the dorsal side of the spinal cord is where sensory nerves will enter.

Detailed explanation-3: -The lower motor neurons have their cell bodies in the spinal cord (anterior horn cell) and exit the spinal cord to becomethe spinal nerve roots and the nerves that supply the respiratory muscles.

Detailed explanation-4: -Option (c) is correct because motor neurons are responsible for the transfer of impulses to muscles and glands of the body. They stimulate the cells, muscles, and glands for their functioning.