208 Cell Membrane Function Review HB

Front

What is the function of the cell membrane?

Back

The cell membrane regulates what enters and exits the cell, providing protection and support.

Front

What is osmosis?

Back

Osmosis is the movement of water across a selectively permeable membrane without the use of energy.

Front

What type of molecules require transport proteins to cross the cell membrane?

Back

Large or charged (polar) molecules require transport proteins to cross the cell membrane.

Front

Define simple diffusion.

Back

Simple diffusion is the movement of solutes from an area of high concentration to an area of low concentration.

Front

What is homeostasis?

Back

Homeostasis is the state of equilibrium in the body, where internal conditions remain stable.

Front

What role do transport proteins play in cell membranes?

Back

Transport proteins facilitate the movement of substances across the cell membrane that cannot pass freely.

Front

What is the difference between passive and active transport?

Back

Passive transport does not require energy, while active transport requires energy to move substances against their concentration gradient.

Front

What is a selectively permeable membrane?

Back

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

Front

What is the significance of concentration gradients in cell transport?

Back

Concentration gradients drive the movement of substances during diffusion and osmosis.

Front

How does the structure of the cell membrane contribute to its function?

Back

The cell membrane's phospholipid bilayer structure allows it to be fluid and selectively permeable.