7.3 bellringer biology

Question 1

facilitated diffusion is the process by which molecules diffuse across a _____ through protein channels.

Answer 1

membrane

Question 2

the movement of materials in the cell against a _______differnce is active transport.

Answer 2

concentration

Question 3

if a substance is more highly concentrated outside the cell than inside the cell and the substance can move through the cell membrane, the substance will move by______.

Answer 3

diffusion

Question 4

the concentration of a solution is defined as the mass of solute in a given______ of solution.

Answer 4

volume

Question 5

unlike a cell wall, a cell membrane is composed of a ______.

Answer 5

Lipid bilayer