How long does it take for an action potential to occur?
Correct answer: B. Few milliseconds
- A. Few minutes
- B. Few milliseconds
- C. Few hours
- D. Few seconds
Explanation
Action potential is a temporary localized reversal of the polarity of the neurolemma, which occurs when the neurolemma is stimulated (e.g.electric shock, touch, sound, vibrations, etc). During the action potential, the polarity of the neurolemma first changes to +40mv (depolarization) and then restores to -65mv again (i.e., repolarization). This action is extremely rapid as it occurs only in a few milliseconds. to happen. Hence, option B is correct.
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About Coordination and Control
Coordination depends on receptors, neurons, synapses and nerve impulses, with reflex actions traced through the reflex arc and the roles of major brain regions. Chemical coordination covers endocrine glands and hormones, including how hormones regulate growth, metabolism, reproduction and internal balance, unlike rapid nervous control.
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