Where does an action potential occur? Explain the process of what occurs inside the axon (the membrane) as the action potential is traveling down the axon.

The oxidizing agent our bodies use to obtain energy from food is oxygen (from the air). if you breathe 15 times a minute (at rest), taking in and exhaling 0.5 l of air with each breath, what volume of air do you breathe each day? air is 21% oxygen by volume. what volume of oxygen do you breathe each day?

How do accessory pigments chlorophyll?

How does the carbon cycle involve an exchange of carbon