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Results tagged with action-potential
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user 11652
A rapid change in the membrane potential of excitable cells such as neurons and muscles; this usually involves a steep rise (depolarization) followed by a steep fall in membrane potential (repolarization). The cell subsequently enters a short refractory period (hyperpolarized state) during which it cannot generate another action potential.
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If a blocker prevents repolarization, will the neuron be stuck in a depolarized state forever?
Potassium channels help to repolarize the cell after depolarization. But if the potassium channels are blocked, potassium ions cannot flow out of the cell to increase the membrane potential. Thus, one …
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Do potassium channel blockers affect the resting membrane potential?
I am reading about scorpion venoms and toxins for my bio class and they appear to have a variety of potassium channel blockers. My professor asked "What effect would this have on a neuron?" and natura …
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What is the difference between a graded potential and an action potential?
I was under the impression the only signals neurons send using changes in membrane potential are action potentials. But my biology professor showed us diagrams of graded potentials and action potentia …
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