In action potential depolarization, repolarization and recovery takes_time:
Correct answer: C. 2-3 milliseconds
- A. 2-3 seconds
- B. 2-3 minutes
- C. 2-3 milliseconds
- D. 2-3 microseconds
Explanation
Depolarization takes 1 milisecond. During this phase, the cell's membrane potential briefly becomes more negative than it's resting state before returning to normal. This hyperpolarization is caused by the continued efflux of potassium ions. The recovery phase is also relatively short, taking about 1 millisecond. In summary it is 2-3 miliseconds.
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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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