Question

Which of the following accurately describes an example of how materials can move across the cell membrane through active transport?
Answer
A protein acts as a channel to allow large, hydrophilic molecules to diffuse across the cell membrane.
A protein acts as a pump and moves calcium ions from an area of low concentration to an area of high concentration.
The cell membrane folds to surround a substance and bring the substance inside the cell during exocytosis.
Water moves by osmosis from higher concentration to lower concentration by passing through proteins called aquaporins.

2 point

Answer 1

A.

Answer 2

thanks i got about ten more questions if your willing to help ill post them

Answer 3

a.