Cell Membrane and Transport

Front

What is the function of the cell membrane?

Back

The cell membrane controls what substances may enter or leave the cell, helping maintain homeostasis.

Front

Define Passive Transport.

Back

Passive Transport is the movement of particles from high to low concentration without the use of energy.

Front

What is Active Transport?

Back

Active Transport is the movement of solutes against the concentration gradient from low to high concentration, requiring energy.

Front

Explain Osmosis.

Back

Osmosis is the movement of water across a semipermeable membrane from an area of high water concentration to an area of low water concentration.

Front

What is the concentration gradient?

Back

The concentration gradient is the difference in the concentration of a substance across a space.

Front

What happens during diffusion?

Back

During diffusion, particles move from an area of high concentration to an area of low concentration until equilibrium is reached.

Front

What is the role of proteins in the cell membrane?

Back

Proteins in the cell membrane assist in transporting substances across the membrane and can act as receptors for signaling.

Front

What is a semipermeable membrane?

Back

A semipermeable membrane allows certain molecules or ions to pass through it while blocking others.

Front

What is the difference between passive and active transport?

Back

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

Front

What is facilitated diffusion?

Back

Facilitated diffusion is a type of passive transport that uses transport proteins to help move substances across the cell membrane.