4.
Myelin Sheath is an insulator on the axon
Hope that helps! :)
Reproduction is to create or recreate something, usually a new living thing, such as a baby. ... Most bacteria reproduce by asexual reproduction. Some organisms can either reproduce sexually or asexually.
Answer:
C. They break down food materials into forms the cell can use.
Storing energy is an important function
1. Rhythm generators (SA node)
2. Conductive cells (node cells)
3. Contractile cells (myocardial cells)
