Assuming one nerve impulse must end before another can begin, what is the maximum firing rate of a nerve in impulses per second?

The correct answer is - 10³ seconds.

Explanation:

The nerve impulse is an electrical signal in which fluctuation in membrane potential occurs and forms an electrical signal that takes place that travels along the axon to the synapses.

Suppose a nerve impulse starts only when the first impulse ends according to the question so the one impulse last for the 10⁻³ second or 1 ms.  

Thus,  the nerve impulse fires per second will be equal to impulse generate in each second which is 1/10⁻³ = 10³.

Thus, the correct answer is - 10³ impulse per second or 1000 impulse per second.

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answers are:

lysogenic     viral dna merges with host cell dna

lysogenic     no symptoms

lytic               viral dna takes over

lysogenic     virus does not destroy host cell

lytic               virus destroys host cell

lytic               induces symptoms of viral infection

lysogenic       cell reproduces and spreads provirus