Active transport is the movement of molecules across a cell membrane from a region of their lower concentration to a region of their higher concentration—in the direction against some gradient or other obstructing factor (often a concentration gradient). read more
Let's talk about a specific example of active transport that is going on in all of your nerve cells right now. Your nerve cells require that a specific concentration gradient of sodium and potassium be maintained in order to properly conduct your signals. There is a higher concentration of sodium ions outside a cell than inside a cell. read more
2.Explain how active transport helps a nerve cell maintain its resting potential. 3.The Atlantic cod is a common fish of the Atlantic Ocean that must drink seawater to meet its water needs. read more