Cell Transport Review

Front

What is diffusion?

Back

Diffusion is the movement of particles from an area of higher concentration to an area of lower concentration across a membrane.

Front

When does diffusion occur across a membrane?

Back

Diffusion occurs when the concentration of particles is different on each side of the membrane.

Front

Which substances can easily travel through the phospholipid bilayer?

Back

Oxygen molecules can easily travel through the phospholipid bilayer.

Front

What happens to a cell in a hypertonic solution?

Back

The cell will lose water and shrink.

Front

What is endocytosis?

Back

Endocytosis is the process by which cells take in substances by engulfing them in a membrane.

Front

What is exocytosis?

Back

Exocytosis is the process by which cells expel materials in vesicles that fuse with the cell membrane.

Front

What is active transport?

Back

Active transport is the movement of substances across a membrane against their concentration gradient, requiring energy.

Front

What are transport proteins?

Back

Transport proteins are proteins that help move substances across a cell membrane, especially during active transport.

Front

What is the sodium-potassium pump?

Back

The sodium-potassium pump is a type of active transport that moves sodium ions out of the cell and potassium ions into the cell.

Front

What is osmosis?

Back

Osmosis is the diffusion of water across a selectively permeable membrane.