Diffusion

Question 1

Diffusion

Answer 1

net movement of molecules or ions from a region where they are more highly concentrated to one where their concentration is lower until evenly distributed

Question 2

Facilitated Diffusion

Answer 2

protein molecules and carrier proteins are involved and is a passive process

Question 3

Protein channels

Answer 3

• allow water-soluble ions to pass through
• are selective and open in the presence of specific ions
• ions bind with specific ion causing it to change shape closing it one side and opening it the other

Question 4

carrier proteins

Answer 4

• when molecule specific to protein is present, it binds with the protein causing it to change shape releasing the molecule to the inside of the cell
• no external energy is needed
• Molecules move from high conc to a low conc