Cell Transport and Cell Cycle

Front

What is diffusion?

Back

The movement of molecules from an area of high concentration to an area of low concentration.

Front

What is osmosis?

Back

The movement of water across a semipermeable membrane.

Front

What happens to a cell placed in an isotonic solution?

Back

It remains the same.

Front

What happens to a cell placed in a hypotonic solution?

Back

It swells.

Front

Which of the following is an example of passive transport?

Back

Facilitated diffusion.

Front

What is active transport?

Back

The movement of molecules against their concentration gradient, requiring energy.

Front

What is a semipermeable membrane?

Back

A membrane that allows certain molecules to pass through while blocking others.

Front

What is the role of the sodium-potassium pump?

Back

To maintain the electrochemical gradient by pumping sodium out and potassium into the cell.

Front

What is endocytosis?

Back

The process by which cells take in substances by engulfing them in a membrane.

Front

What is exocytosis?

Back

The process by which cells expel materials in vesicles that fuse with the plasma membrane.