What is initiated by a rapid influx of sodium ions into contractile cells creating a positive membrane potential inside the cell?

Action potential

Explanation:

Once stimulated, the sodium gates in the contractile cell membrane open to allow sodium ions flow inside, while potassium ions flow out leading to a depolarized membrane.

This event create a positive membrane potential inside the cell, and a net negative potential outside the membrane.

Thus, the rapid influx of sodium ions initiate action potential

each of the 46 original chromosomes splits into two daughter chromosomes, so there are two sets of 46 daughter chromosomes that end up in each cell. human cells have 46 chromosomes. each chromosome consists of a pair of identical chromatids attached together by a structure called a centromere.

the actual answer was 160934