Passive Transport

Front

What is passive transport?

Back

Passive transport is the movement of molecules across a cell membrane without the use of energy, relying on concentration gradients.

Front

What is osmosis?

Back

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

Front

What role does the cell membrane play in homeostasis?

Back

The cell membrane helps maintain homeostasis by allowing molecules to move into and out of the cell as needed.

Front

What is the Fluid Mosaic Model?

Back

The Fluid Mosaic Model describes the structure of the plasma membrane as a mosaic of various components (lipids, proteins, carbohydrates) that are fluid and can move laterally.

Front

What happens when a cell membrane malfunctions?

Back

A malfunctioning cell membrane can prevent the import of essential substances, affecting the cell's ability to process chemical energy.

Front

What is cytolysis?

Back

Cytolysis is the process where a cell bursts due to excessive internal pressure, often caused by an influx of water.

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 diffusion?

Back

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

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 are transport proteins?

Back

Transport proteins are proteins that assist in the movement of substances across a cell membrane, either by providing a passageway or by changing shape.