The purpose of the myelin that surrounds the axon is to keep nerve cells continually active. help electrical currents cross the synapse completely. repair neurons within the peripheral nervous system. speed the transmission of an impulse down the axon.

Speed up transmission of impulse down the axon

Explanation:

Myelin shear make impulse run faster and it's node of Ranvier quicken the impulse by permitting it to jump across it

the abdomen (less formally called the belly, stomach, tummy or midriff) constitutes the part of the body between the thorax (chest) and pelvis, in humans and in other vertebrates. the region occupied by the abdomen is termed the abdominal cavity. the stomach secretes acid and enzymes that digest food. ridges of muscle tissue called rugae line the stomach. the stomach muscles contract periodically, churning food to enhance digestion. the pyloric sphincter is a muscular valve that opens to allow food to pass from the stomach to the small intestine.

a. the production of carbon dioxide through the process of photosynthesis