If the dorsal root of a spinal nerve were to be cut,the individual would
A)have no motor responses for that nerve.
B)have no sensory perception from that nerve.
C)have no reflexes involving that nerve.
D)Both have no sensory perception from that nerve and have no reflexes involving that nerve are correct.

Question

Quizplus · Accepted Answer

The dorsal root of a spinal nerve contains sensory neurons that transmit sensations from the body to the spinal cord. If it were cut, the individual would lose all sensory perception from that nerve. Additionally, reflexes involve a sensory neuron synapsing with a motor neuron, so without sensory input, the reflex would not occur. Motor responses are controlled by the ventral root of a spinal nerve, so cutting the dorsal root would not affect motor responses.

If the Dorsal Root of a Spinal Nerve Were to Be