Cell Transport & Homeostasis

Front

What happens to your breathing rate when oxygen levels rise after being low?

Back

Return breathing rate to baseline.

Front

The plasma membrane (cell membrane) is __________ _________ .

Back

Selectively permeable.

Front

What is the main difference between passive transport and active transport?

Back

Active transport requires energy.

Front

What forms the two layers of the cell membrane?

Back

Phospholipids.

Front

Define osmosis.

Back

Diffusion of water molecules through a semi-permeable membrane from an area of high concentration to an area of low concentration.

Front

What is passive transport?

Back

Movement of substances across a cell membrane without the use of energy.

Front

What is active transport?

Back

Movement of substances against their concentration gradient, requiring energy.

Front

What role do proteins play in the cell membrane?

Back

Proteins assist in transport and communication across the membrane.

Front

What is the function of cholesterol in the cell membrane?

Back

Cholesterol helps to maintain membrane fluidity.

Front

What is a concentration gradient?

Back

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