Transport Accross Membranes

Question 1

Facilitated Diffusion

Answer 1

Random net movement of molecule from area of high to low concentration using no ATP (passive). Channel protein stretches hydrolytic carrier for ions to pass.

Question 2

Osmosis

Answer 2

Passive. Random net movement of molecules from area of high to low water potential through partially permeable membrane.

Question 3

Active Transport

Answer 3

Movement of molecule against concentration gradient with carrier proteins (ATP required).

Question 4

Exo/Endocytosis

Answer 4

Bulk transport of molecules into cell (endo) and out of cell (exo).

Question 5

Diffusion

Answer 5

Passive process. The net movement of molecule from area of high to low concentration. Small non-polar ions only.