Final answer:
The myelin sheath is a fatty substance that covers axons, acts as an insulator, and speeds up the transmission of nerve impulses.
Explanation:
The myelin sheath is the subject of the question. The myelin sheath is a fatty substance that covers axons, acting as an insulator and allowing faster transmission of electrical signals along the axon. It helps speed up the transmission of nerve impulses by allowing them to skip along the axon very rapidly.
Learn more about Myelin Sheath here:
https://brainly.com/question/37982616
