Cell Membrane and Transport

Front

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

Back

Selectively (or Semi) Permeable.

Front

How does a cell maintain homeostasis?

Back

Regulates what enters and leaves the cell.

Front

Which statement best describes the cell membrane?

Back

The protective outer layer that controls what enters and leaves the cell.

Front

What are two types of passive transport?

Back

Osmosis and diffusion.

Front

During osmosis, what happens to water?

Back

Water moves from high to low concentration.

Front

What is the primary function of the cell membrane?

Back

To act as a barrier that regulates the movement of substances in and out of the cell.

Front

Define osmosis.

Back

The movement of water molecules from an area of high concentration to an area of low concentration through a selectively permeable membrane.

Front

What is diffusion?

Back

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

Front

What role do proteins play in the cell membrane?

Back

Proteins help transport substances across the membrane and act as receptors for signaling.

Front

What is active transport?

Back

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