Cell Transport

Front

What is diffusion in the context of cell transport?

Back

Diffusion is the passive movement of molecules from an area of higher concentration to an area of lower concentration until equilibrium is reached.

Front

What type of cellular transport is represented by the release of substances from a cell?

Back

Exocytosis is the process by which cells expel materials in vesicles that fuse with the plasma membrane.

Front

What is the primary function of exocytosis?

Back

The primary function of exocytosis is to transport large molecules, such as proteins and hormones, out of the cell.

Front

What is active transport?

Back

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

Front

How does active transport differ from 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 is the role of ATP in cellular transport?

Back

ATP provides the energy required for active transport processes, allowing cells to move substances against their concentration gradients.

Front

What happens to small molecules when no energy is used in transport?

Back

Small molecules will move into the cell through passive transport mechanisms, such as diffusion, if there is a higher concentration outside the cell.

Front

What is osmosis?

Back

Osmosis is the diffusion of water molecules across a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration.

Front

What is the significance of the concentration gradient in cell transport?

Back

The concentration gradient is crucial as it determines the direction of movement for molecules during passive transport; substances move from areas of high concentration to low concentration.

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 without the use of energy.