Cell Membrane and Transport

Front

What is the cell membrane?

Back

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

Front

What process is described as the movement of molecules from an area of higher concentration to an area of lower concentration?

Back

Diffusion

Front

What does it mean for a membrane to be selectively permeable?

Back

It means that some molecules can cross the membrane while others cannot.

Front

True or False: Regulating what enters and leaves the cell helps maintain homeostasis.

Back

True

Front

What is a phospholipid?

Back

A molecule that makes up the cell membrane, consisting of a hydrophilic (water-attracting) head and two hydrophobic (water-repelling) tails.

Front

What is osmosis?

Back

The diffusion of water molecules across a selectively permeable membrane.

Front

What is active transport?

Back

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

Front

What is the function of integral proteins in the cell membrane?

Back

They help transport substances across the membrane and can act as channels or carriers.

Front

What role do carbohydrate chains play in the cell membrane?

Back

They are involved in cell recognition and signaling.

Front

What is homeostasis?

Back

The process by which a cell maintains a stable internal environment despite changes in external conditions.