Answer:
All axons have a myelin sheath.
Explanation:
The neurons with a myelin sheath around their axons are called myelinated neurons. Oligodendrocytes of the central nervous system and Schwann cells of the peripheral nervous system are responsible for the formation of this sheath around the axons. However, not all neurons are myelinated. A non-myelinated neuron or unmyelinated neurons are present in the central nervous system as well as in the peripheral nervous systems. For example, the axons of group c nerve fibers do not have the myelin sheath.
Answer: Option A is false.
All axon have myelin sheath.
Explanation:
Myelin sheath is a layer that surrond the nerve cells axon and provide insulation to the nerves. Myelin sheath are made up of protein and lipids.
Axon is a long projection of nerve cell that conduct electrical impulses away from the cell body. Not all axons are have myelin sheath
Axon can either be myelinated i.e is covered with Myelin sheath or unmyelinated. The myelinated axons are ensheathed along their length. The presence of myelin sheath on axons help to increase in speed of electrical impulses spreading all ng the myelinated fibre. Oligodendrocytes of Central nervous system and schawn cells of peripheral nervous system perform the function of producing myelin sheaths.
Examples of nerves without myelin sheath is the axons of group c nerve fibre.
