The sheaths wrapped around nerve fibers of the peripheral nervous system can be:

A) myelinated or unmyelinated.
B) myelinated or striated.
C) striated or unstriated.
D) unmyelinated or unstriated.

Myelinated

Refers to nerve fibers that are covered with a fatty substance called myelin, which increases the speed at which electrical signals (nerve impulses) are passed along the nerve.

Peripheral Nervous System

The part of the nervous system that consists of the nerves and ganglia outside of the brain and spinal cord.

Unmyelinated

Describing nerve fibers that lack a myelin sheath, affecting the speed and manner in which nerve impulses are conducted.