I. Large or charged molecules move with the concentration gradient. II. Water moves against the concentration gradient

III. Transport requires a membrane protein and ATP energy.

IV. A membrane protein is used to move molecules with the concentration gradient.

V. This is a form of passive transport.

VI. Small, nonpolar molecules move with the concentration gradient.

1)

The prompt contains several characteristics of cell transport. Which of these applies to facilitated diffusion?

A) I only

B) I, IV, V

C) I, II, IV

D) II, III, V, VI

2)

Which scenario is MOST likely to use facilitates diffusion for transport?

A) Water moves from high to low concentration.

B) Glucose moves into the cell from high to low concentration.

C) O2 diffuses from the alveoli into the blood stream, without the use of energy.

D) Na+ moves out and K+ moves into the cell against the concentration gradient.