Heart cell
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- When a heart cell is at rest, the concentration of positive sodium ions outside the cell is greater than the concentration inside the cell, so there is an electrical potential.
- Denis Noble, still a PhD student at the time, showed that mathematical equations could model how the electrical activity of a heart cell is influenced by the movement of sodium and potassium ions in and out, transported by pumps, channels that sit in the cell’s membrane.
- uk for more! Group member(s): Dr Christine Munding (postdoctoral fellow; right hand side) Myofibril and intercalated disk assembly during heart development The 1000 contractile work of a heart cell is performed by the myofibrils.
- The action potential is the change in voltage over a period of time that occurs when a heart cell is activated.
- While it's in the refractory state, a heart cell is unable to conduct an impulse.
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