Passive/Active Transport Test Review

As a result of diffusion, the concentration of many types of substances

• always remains greater inside a membrane.

• eventually becomes balanced on both sides of a membrane.

• always remains greater outside of a membrane.

• becomes imbalanced on both sides of a membrane.

The diffusion of water into or out of a cell is called

• solubility.

• selective transport.

• osmosis.

• endocytosis.

Transport proteins that allow ions to pass through the cell membrane are called

• receptor proteins.

• marker proteins

• ion channels.

• None of the above

Sugar molecules cross the cell membrane by

• active transport.

• osmosis.

• facilitated diffusion.

• gated channels.

Both active transport and facilitated diffusion involve

• ATP.

• movement against a concentration gradient.

• carrier proteins.

• All of the above

The sodium-potassium pump

• is a carrier protein

• is located in the cytoplasm of a cell.

• uses passive transport.

• transports sugar molecules.

Which of the following is a form of active transport?

• osmosis

• facilitated diffusion

• diffusion

• sodium-potassium pump

Proteins and polysaccharides that are too large to move into a cell through diffusion or active transport move in by

• exocytosis.

• the sodium-potassium pump.

• endocytosis

• None of the above

Molecules that are too large to be moved through the membrane can be transported into the cell by

• osmosis.

• exocytosis.

• endocytosis.

• diffusion.

Molecules that are too large to be moved across a cell membrane can be removed from the cell by

• diffusion.

• endocytosis.

• exocytosis

• osmosis.