Which one of the following best describes the order of a somatic reflex? A. Somatic receptor → efferent nerve fiber → afferent nerve fiber → interneuron → skeletal muscle B. Somatic receptor → efferent nerve fiber → interneuron → afferent nerve fiber → skeletal muscle C. Somatic receptor → afferent nerve fiber → interneuron → efferent nerve fiber → skeletal muscle D. Somatic receptor → interneuron → afferent nerve fiber → efferent nerve fiber → skeletal muscle E. Somatic receptor → afferent nerve fiber → interneuron → efferent nerve fiber → smooth muscle

C. Somatic receptor → afferent nerve fiber → interneuron → efferent nerve fiber → skeletal muscle

Explanation:

This is the reflex act that nerve transmission as action potential passes through from the receptors in the skin of the target, and carried by the sensory neuron to the CNS, for effective integration, and response, which is transmitted through the efferent neuron (motor neuron) to bring about response at the effector which is the skeletal muscle.

The entire sequence of action is called reflex action. While the pathway as described above is called reflex arc.

Option C: Somatic receptor → afferent nerve fiber → interneuron → efferent nerve fiber → skeletal muscle

Explanation:

The somatic receptors receive the stimulus which can be mechanical etc which is then carried by the afferent neurons which are unipolar neurons that enter the spinal cord through the dorsal root the relay neuron (interneuron) connects the afferent and the efferent neurons while the somatic efferent neurons are motor neurons that conduct impulses from the spinal cord to skeletal muscles bringing about the reaction exhibited.