Membrane Transport

Front

What is osmosis?

Back

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

Front

What type of transport does not require energy?

Back

Passive transport does not require energy.

Front

What is active transport?

Back

Active transport is the movement of molecules across a membrane from a region of lower concentration to a region of higher concentration, requiring energy.

Front

Describe the process of osmosis.

Back

During osmosis, water moves from an area of high water concentration (or low solute concentration) to an area of low water concentration (or high solute concentration) through a semi-permeable membrane.

Front

Does osmosis require energy?

Back

No, osmosis requires zero energy.

Front

What is diffusion?

Back

Diffusion is the movement of molecules from an area of high concentration to an area of low concentration without the use of energy.

Front

What is facilitated diffusion?

Back

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

Front

What is a selectively permeable membrane?

Back

A selectively permeable membrane is a barrier that allows certain substances to pass through while blocking others.

Front

What is the difference between active transport and passive transport?

Back

Active transport requires energy to move substances against their concentration gradient, while passive transport does not require energy and moves substances along their concentration gradient.

Front

What role do proteins play in membrane transport?

Back

Proteins can act as channels or carriers to facilitate the movement of substances across the cell membrane.