Movement through the plasma membrane

Question 1

What is a plasma membrane

Answer 1

The skin of the cell

Question 2

Four ways materials pass through the plasma membrane

Answer 2

Diffusion
Osmosis
Facilitated diffusion
Active transport

Question 3

What is diffusion

Answer 3

The passive movement of molecules from a region of higher concentration to a region of lower concentration.

Question 4

What is osmosis

Answer 4

A special type a diffusion that involves the movement of water in and out of the cell.

Question 5

What is facilitated diffusion

Answer 5

Diffusion of molecules across the cell membrane with the help of
special proteins in the cell membrane.

Question 6

What is active transport

Answer 6

: Molecules move across the cell membrane from a region of lower con
centration to a region of higher concentration with the help of special proteins in the cell
membrane; active transport requires the cell to expend energy