Nerve cells send messages in a process that involves the movement of potassium ions rushing out of the cell and then being pumped back inside the cell. These processes allow homeostasis to be maintained in the nervous system
Which two observations support the conclusion that the movement of potassium ions involves active transport? Select two answer choices

Dr. arenas is a scientist who has been trying to determine if increasing pressure will increase the sound that occurs when two chemicals explode. it measures the volume of the sound that occurs at the minimum pressure at which the explosion will occur. it then increases the pressure and measures the volume of the explosions that occur. what kind of investigation is the scientist conducting?