Front

What is passive transport?

Back

Passive transport is the movement of substances across a cell membrane without the use of energy, following the concentration gradient.

Front

What is active transport?

Back

Active transport is the movement of substances against their concentration gradient, requiring energy (usually from ATP) and transport proteins.

Front

Define facilitated diffusion.

Back

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

Front

What is the role of transport proteins in facilitated diffusion?

Back

Transport proteins assist in the movement of specific molecules across the cell membrane without using energy.

Front

What is an example of a molecule that uses facilitated diffusion?

Back

Glucose is a common example of a molecule that uses facilitated diffusion to cross the cell membrane.

Front

What is endocytosis?

Back

Endocytosis is a form of active transport where cells engulf substances to bring them into the cell.

Front

What is exocytosis?

Back

Exocytosis is the process by which a cell expels materials in vesicles, releasing them outside the cell.

Front

What are protein pumps?

Back

Protein pumps are transport proteins that actively move ions or molecules against their concentration gradient using energy.

Front

What is the concentration gradient?

Back

The concentration gradient is the difference in the concentration of a substance across a space, driving passive transport.

Front

What is osmosis?

Back

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