What happens if axon of motor neuron is destroyed?
a) blockage of receptor sites
b) slowing of nerve impulse
c) continuous stimulation of sensory receptor
d) an increase in number of nodes of Ranvier
The main function of motor neuron is to connect the central nervous system with the muscles which generally directly or indirectly controls it. In other words, motor neurons carry signals from the spinal cord to the muscles thus allowing movement to happen. The axons of the motor neurons are projected outside the central nervous system to the target muscles or tissues thus allowing the passage of the nerve impulse.
When the axon will be damaged, the first thing that will be affected is the transfer of the nerve impulses (electrical impulses) or the information from the origin to the destination. Therefore the answer would be letter B: slowing of nerve impulse.