Answer is A
Firstly axon must reach the threshold level and then depolarisation occurs. Depolarisation phrase means sodium enters and potassium leaves the axon . Choice C can't be because main idea is the entering of sodium ions.
Answer:
The answer is no. Total solar eclipses can happen on other planets too, as long as they have moons that are big enough to cover the sun's disk from the planet's perspective and orbit the planet on the same plane as the sun, astronomers told Live Science.
Explanation:
Answer:
Cilia
Explanation:
Cilia are the hair-like extensions used like oars to propel protists. They move in a wave-like pattern to move the protist.
air pressure is usually exerted counterclockwise
