Review: Active & Passive Transport

Front

What is phagocytosis?

Back

Phagocytosis is a type of endocytosis where a cell engulfs large particles or microorganisms, such as bacteria, to destroy them.

Front

What is passive transport?

Back

Passive transport is the movement of molecules across a cell membrane without the use of energy, typically from an area of high concentration to an area of low concentration.

Front

What is diffusion?

Back

Diffusion is the process by which molecules spread from an area of high concentration to an area of low concentration.

Front

What is osmosis?

Back

Osmosis is the diffusion of water molecules through a selectively permeable membrane from an area of low solute concentration to an area of high solute concentration.

Front

What is active transport?

Back

Active transport is the movement of molecules across a cell membrane against their concentration gradient, requiring energy (ATP).

Front

What is exocytosis?

Back

Exocytosis is a process where cells expel materials in vesicles that fuse with the cell membrane, releasing their contents outside the cell.

Front

What is endocytosis?

Back

Endocytosis is the process by which cells take in substances by engulfing them in a vesicle.

Front

What is the difference between active 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 down their concentration gradient.

Front

What does 'high concentration' mean?

Back

High concentration refers to a situation where molecules are tightly packed together in a given volume.

Front

What is the role of the cell membrane in transport?

Back

The cell membrane regulates the movement of substances in and out of the cell, maintaining homeostasis.