Answer:
They use a hard shell, but not hard enough though because we humans can get through them hehehe
Answer: depolarization
Explanation:
On depolarization, the sodium gates in the neuron membrane closes after sodium ions flow inside, while potassium gates open causing potassium ions to flow out and reestablish the original resting potential of the membrane.
The rapid change in membrane potential from resting to action potential is DEPOLARIZATION
Answer: Bones cells secrete an extracellular matrix that when combined with minerals becomes rock hard.
Explanation:
Answer:
C. Makes energy in cells
Explanation:
Nitrogen has the role of making energy in cells of the human body.