The sodium-potassium ion exchange pump: must reestablish ion concentrations after each action potential. transports sodium ions into the cell during depolarization. depends on a hydrogen gradient for energy. moves sodium and potassium opposite to the direction of their electrochemical gradients.
63) The sodium-potassium ion exchange pump. A) must reestablish ion concentrations after each action potential. B) transports sodium ions into the cell during depolarization. C) transports potassium ions out of the cell during repolarization. D) moves sodium and potassium opposite to the direction of their electrochemical gradients.
Na⁺/K⁺-ATPase (sodium-potassium adenosine triphosphatase, also known as the Na⁺/K⁺ pump or sodium–potassium pump) is an enzyme (an electrogenic transmembrane ATPase) found in the plasma membrane of all animal cells. It performs several functions in cell physiology.. The Na + /K +-ATPase enzyme is a solute pump that pumps potassium into cells while pumping sodium out of cells, both ...
Sodium Potassium Pump - Na+ K+ Pump for Active Transport over the cell membrane. The sodium potassium pump, is responsible for maintaining the electrical charge inside the cell and keep the cells ...
Abstract. A model for the Na-K exchange pump was applied to data on Na +-loaded frog sartorius muscle, and was used to relate the rate of adenosine triphosphate (ATP) hydrolysis to the electrical properties of the cell membrane.Membrane hyperpolarization was considered to arise from an electrical current which was produced by the hydrolysis reaction coupled to ion movements, and which flowed ...
Sodium-Potassium Exchange Pump (Quiz 3) ... The sodium potassium pump is a well understood example of active transport. Sodium and potassium ions are pumped in opposite directions across the membrane building up a chemical and electrical gradient for each. These gradients can be used to drive other transport processes.
The sodium-potassium exchange pump counteracts these movements; for each molecule of ATP expended by the cell, this exchange pump ejects three sodium ions and reclaims two potassium ions. In this way, the sodium-potassium exchange pump maintains the transmembrane potential and stabilizes the ion composition of the intracellular fluid.
sodium pump (sodium-potassium pump) the mechanism of active transport driven by the energy generated by Na +,K +-ATP ase, by which sodium (Na +) is extruded from a cell and potassium (K +) is brought in, so as to maintain the low concentration of sodium and the high concentration of potassium within the cell with respect to the surrounding medium.A high concentration of intracellular potassium ...
ion pumps __ pump is a special type of ion pump. It is specifically called an exchange pump because it moves one ion into a cell against its concentration gradient, while moving another type of ion out of the cell against its concentration gradient. Na+/K+ __ pump can be thought of as a “dual pump.”
The exchange pumps The outward sodium current generated by the sodium-potassium pump must move back into the cell to complete a closed circuit. Sodium must do this through what is known as the 'exchange pumps'. These pumps are also located on the cell membrane and their job is to regulate other functions of the cell:…