GENERAL HISTOLOGY

Detailed explanation-1: -The correct sequence of the components in a reflex arc is given below: Receptors → Sensory neuron → Spinal cord → Motor neuron → Muscle.

Detailed explanation-2: -Interneurons. As the name suggests, interneurons are the ones in between-they connect spinal motor and sensory neurons. As well as transferring signals between sensory and motor neurons, interneurons can also communicate with each other, forming circuits of various complexity.

Detailed explanation-3: -The primary components of the reflex arc are the sensory neurons (or receptors) that receive stimulation and in turn connect to other nerve cells that activate muscle cells (or effectors), which perform the reflex action.

Detailed explanation-4: -Receptors→sensory neuron→spinal cord→motor neuron→muscles. The path taken by nerve impulse in a reflex action is called a reflex arc.

Detailed explanation-5: -The neuron which carries nerve impulses from receptors to the spinal cord is sensory neuron and is also called as afferent neuron. Efferent or motor neurons carry impulses away from the spinal cord to effectors.