Cell Membrane and Transport

Front

Something is ___________ ____________ when some molecules can cross the membrane while others cannot.

Back

Selectively (or Semi) Permeable

Front

Which describes an isotonic environment?

Back

Concentrations of water are equal inside and outside the cell.

Front

The movement of particles from an area of high to low concentration is known as--

Back

Passive Transport

Front

Which describes a hypertonic environment?

Back

Too little water in the cell will cause the cell to shrink - the percentage of water is lower outside the cell than inside the cell.

Front

Which describes a hypotonic environment?

Back

Too much water in the cell will cause the cell to burst - the percentage of water is higher outside the cell than inside the cell.

Front

What is the primary function of the cell membrane?

Back

To protect the cell and regulate what enters and leaves.

Front

Define diffusion.

Back

The process by which molecules spread from areas of high concentration to areas of low concentration.

Front

What is osmosis?

Back

The diffusion of water across a selectively permeable membrane.

Front

What is active transport?

Back

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

Front

What is the difference between passive and active transport?

Back

Passive transport does not require energy, while active transport does.