Question

describing the calcium pump
use the drop-down menu to complete the sentence.
the calcium pump is responsible for moving calcium cells.
out of
into
throughout

Explanation:

The calcium pump (a type of ion pump) functions to move calcium ions out of cells (e.g., in muscle cells, after contraction, calcium is pumped out of the sarcoplasm back into the sarcoplasmic reticulum, which is a form of moving out of the main cellular space involved in contraction). Among the options, "out of" is the correct term based on biological knowledge of calcium pump function.

Answer:

out of