The falling phase of the action potential is due mainly to

A) The falling phase of the action potential is due mainly to K flow into the cell only.
B) Na flow out of the cell and K flow into the cell.
C) Na flow out of the cell only.
D) K flow out of the cell only.
E) Na flow in the cell only.

Explanation for basic character?

Rocks, as they are compressed, begin forming mountains above the earth's surface when two continental plates converge. the continental crust increases in depth as the mountains grow above. the himalayan mountains formed at a convergent plate boundary in this manner. the rocks are smashed together causing them to due to the intense heat and pressure from the colliding plates and eventually forming rock. a) melt; igneous b) layer; sedimentary c) recrystallize; metamorphic d) melt into the earth's interior; metamorphic

How can one make a supersaturated solution? (apex)