Question

Do dorsal roots of spinal nerves contain sensory or motor neurons?

1) Sensory neurons
2) Motor neurons
3) Both sensory and motor neurons
4) Neither sensory nor motor neurons

Answer 1

The dorsal roots of spinal nerves contain sensory neurons (Option 1).

Step-by-step explanation:

The spinal nerves are classified into dorsal (posterior) and ventral (anterior) roots. The dorsal roots are associated with sensory neurons, conveying sensory information from peripheral receptors (such as skin, muscles, and organs) towards the spinal cord. These sensory neurons play a crucial role in transmitting information about touch, pain, temperature, and other sensory modalities to the central nervous system.

In contrast, ventral roots are associated with motor neurons, which carry signals from the central nervous system to muscles and glands, enabling motor functions and responses. Therefore, the correct classification for the dorsal roots is that they contain sensory neurons.

Option 1 is the answer.