the na/k pump helps a muscle cell maintain a state of contraction.
the na/k pump helps a muscle cell maintain a state of contraction.
the na/k pump helps a muscle cell maintain a state of?
contraction
during stage 4 of an action potential, the inside of a cardiac muscle cell rests at −90 mv. as the inner muscle cell potential rises towards −60 mv, electrochemical changes begin to take place in the voltage-gated rapid sodium channels, which permit the rapid influx of sodium ions. when enough sodium channels are opened, so that the rapid influx of sodium ions is greater than the tonic efflux of potassium ions, then the resting potential becomes progressively less negative, more and more sodium channels are opened, and an action potential is generated. the electrical potential at which this occurs is called the threshold potential.
bathmotropic
the actions of the na-k-atpase enzyme relate with the creation of calcium-signaling microdomains. na-k-atpase is a protein that pumps na and k across the cell membrane. na-k-atpase helps to keep the body at equilibrium by the movement of those ions through the plasma membrane. this ion pump helps to reset the movement of ions during an action potential by sending k into the cell and sending na out of the cell. since it opposes the normal flow of ions during an action potential, energy in the form of atp (adenosine triphosphate) is used. calcium is also regulated using this na-k-atpase due to the enzyme's interactions with protein and non-protein molecules.
calcium concentration microdomains