SC.912.L.14.2 Cell Transport

The diagram above shows two different kinds of substances, A and B, entering a cell. Identify the molecule that is entering the cell through passive transport.

• A

• B

• A & B

• None of the Above

The diagram above shows two different kinds of substances, A and B, entering a cell. ATP is most likely being used for

• substance A to enter the cell

• both substances to enter the cell

• substance B to enter the cell

• neither substance to enter the cell

Cells need to bring in molecules to carry out cellular processes. Often, this requires molecules moving across the cell membrane with the concentration gradient. How do these molecules get into the cell?

• passive transport by diffusion

• active transport using ATP

• passive transport by osmosis

• phagocytosis

A person with swollen gums rinses his mouth with warm salt water, and the swelling decreases. Which of the following has occurred?

• The swollen gums have absorbed the saltwater solution.

• The saltwater solution lowers the temperature of the water in the gums.

• The salt in the solution has moved against the concentration gradient.

• The water in the gums has moved out due to the high concentration of salt in the solution.

Look at the cross section of a cell membrane of a eukaryotic cell. H+ ions are being pumped from a low concentration to a high concentration. How do you describe this type of transport across the cell membrane?

• active transport

• passive transport

• facilitated diffusion

• co-transport

Osmosis occurs when there is a different concentration of solute molecules on each side of the membrane. The drawing below shows a beaker containing a 30% salt solution and a suspended cell containing a 10% salt solution. What statement best describes the cell after 20 minutes?

• Water will move from the cell into the beaker, resulting in a smaller cell.

• Water will move from the beaker into the cell, resulting in a larger cell.

• Salt will move from the cell into the beaker, resulting in a smaller cell.

• Salt will move from the beaker into the cell, resulting in a larger cell.