A scientist who studies living things is called a biologist
Answer:
there is not enough oxygen for animal to turn to carbon.
Explanation:
A. Cell membrane would be the answer.
The type of ion channels responsible for the depolarization phase of an action potential are Na+ (sodium)
channels. Sodium ions flow inward through the sodium channels and cause an
increase in the concentration of positively charged ions in the cell; this in
turn, leads to depolarization.