Answer:
when the nervous system generates a signal. The signal, an impulse called an action potential, travels through a type of nerve cell called a motor neuron. The neuromuscular junction is the name of the place where the motor neuron reaches a muscle cell.
B. Red blood cells contain a protein that binds with oxygen.
Answer:
It would probably be doing yoga
Opportunistic infections or "ol" long before they become infected by HIV.