Pls explain it!

Dear student,

 

The solutions to your 1st and 2nd query have been provided below:

 

1. Schwann cells form the myelin sheath of the nerve fibers in the PNS (peripheral nervous system). The myelin sheath is a protective sheath around nerve fibers.

 

2. (a) The dorsal root of the spinal nerve contains the sensory (afferent) neurons.

(b) The ventral (anterior) root of the spinal nerve contains the motor (efferent) neurons.

 

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Regards,