Ions play an important role in many of your body's processes. two ions are pumped in opposite directions the membrane up a chemical and electrical gradient for each. these gradients can be used to drive other transport processes. what are these two important ions?

The carbon cycle is best defined as a process in which a. carbon changes from inorganic forms to organic forms and back b. carbon is changed into other elements such as oxygen or nitrogen c. carbon is continually created from the sun’s energy by plants d. carbon is consumed and regenerated from other elements such as oxygen and nitrogen