Cell Transport

Front

What is osmosis?

Back

Osmosis is the diffusion of water across a selectively permeable membrane.

Front

What is active transport?

Back

Active transport is the process by which cells use energy to transport materials across the cell membrane against their concentration gradient.

Front

What does it mean for a solution to be hypertonic to a cell?

Back

A solution is considered hypertonic to the cell if it has a higher concentration of solute compared to the inside of the cell.

Front

What is exocytosis?

Back

Exocytosis is the process by which a cell expels large quantities of toxins and waste materials.

Front

What is simple diffusion?

Back

Simple diffusion is the movement of molecules from an area of higher concentration to an area of lower concentration without the use of energy.

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 concentration gradient.

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 role of transport proteins in cell membranes?

Back

Transport proteins facilitate the movement of substances across the cell membrane, either passively or actively.

Front

What is the significance of concentration gradients in cell transport?

Back

Concentration gradients drive the movement of substances; molecules move from areas of high concentration to areas of low concentration in passive transport.

Front

What is facilitated diffusion?

Back

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