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Results tagged with action-potential
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user 6422
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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What is the effect of extra-cellular potassium concentration on heart rate and conduction ve...
Pathological potassium concentration promotes arrhythmia.
Increased extracellular potassium inactivates $Na^+$ channels and opens $K^+$ channels, causing the cells to become refractory [1]:
Increased …
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Mechanism of antiperistalsis
What is the mechanism of antiperistalsis that occurs during vomiting?
Emetic agents in the bloodstream stimulate chemoreceptors in area postrema and nucleus tractus solitarius [1].
Nucleus trac …
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Fastest and slowest action potential
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Here is what I got after searching action potential:
Speed of action potential along non-myelinated invertebrate axons of ~10μm diameter = less than 1 m/s
Action poten …
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