LS1.7 BIO1 Review

Front

What happens to a cell in a hypotonic saline solution?

Back

Water will enter the cell causing it to swell.

Front

What term describes a cell membrane that allows some molecules to move freely while restricting others?

Back

Semipermeable.

Front

What process is used by a cell to move molecules through a membrane without energy?

Back

Facilitated diffusion.

Front

Why is energy necessary for a nerve cell to expel a sodium ion?

Back

The ion is being transported against a concentration gradient.

Front

Which beaker contains an amphibian egg that would shrink?

Back

Beaker 3.

Front

Define osmosis.

Back

The movement of water across a semipermeable membrane from an area of low solute concentration to an area of high solute concentration.

Front

What is active transport?

Back

The movement of molecules across a cell membrane using energy, typically against a concentration gradient.

Front

Explain facilitated diffusion.

Back

A process where molecules pass through the cell membrane via special proteins without the use of energy.

Front

What is the role of the cell membrane?

Back

To protect the cell and regulate what enters and exits.

Front

Define concentration gradient.

Back

A difference in the concentration of a substance across a space.