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Which event is most significant in initiating the wave of depolarization in a cell?
Wiki User
∙ 11y ago
diffusion of Na+ into the muscle fiber
Wiki User
∙ 11y ago
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Which electrolyte flows into the cell to initiate depolarization?
potassium The answer of potassium is dead wrong. Sodium is the electrolyte that flows into the cell to initiate depolarization. Potassium flows into the cell during repolarization.
Is depolarization in the heart passed cell to cell in the same way they are the neuromuscular junction?
false
There is a greater concentration of na plus and there is a greater concentration of k plus in the cell?
There is a greater concentration of Na plus outside and there is a greater concentration of K plus inside the cell. When the stimulus is delivered, the permeability of the membrane is changed, and Na plus diffuses into the cell, initiating the depolarization of the membrane.
Define the term depolarization?
Depolarization is a term used in biology. It is the change in or loss of polarity or polarization in a cell by removing some of the negative charges.
Describe the action of depolarization and repolarization?
Depolarization is due to the influx of Na+ which causes the cell's internal membrane to become more positive, leading to an action potential. Repolarization occurs when K+ leaves the cell causing the interior of the cell to become negative again.
What cell structure is used to prepare for depolarization?
Sodium potassium pump
The bending of sterocilia toward the direction of the kinocilium of a hair cell causes?
depolarization
What ion is released within the myocardial cell with the depolarization and acts on the contractile proteins causing the cell to contract?
myosin?
Is depolarization the same as contraction in the heart?
The nerve impulse causes the release of acetylcholine from the motor end plate. This causes the depolarization of the membrane of the adjacent muscle cell.
How does the sodium potassium pump help with your homeostasis?
When a nerve cell (neuron) or muscle cell react, they do so by a process called depolarization. Before depolarization, the inside of the cell is slightly negative and the outside is slightly positive. During depolarization, sodium ions rush into the cell while potassium channels leak out. This reverses the original polarization and now the cell is said to be depolarized. The sodium/potassium pump helps reverse this back to its original polarized state so the cell can react again.
Which pump is responsible for muscle contraction through depolarization of muscle cell membrane?
Ca2+
The interior of the cell becomes less negative due to an influx of sodium ions?
Depolarization
