Active Transport, Cell Membrane, and Homeostasis

Front

What is Active Transport?

Back

The movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration, requiring energy.

Front

Define Endocytosis.

Back

A type of active transport that brings particles into a cell by enclosing them in a vesicle formed from the cell membrane.

Front

What is the function of the Cell Membrane?

Back

To regulate what enters and leaves the cell, providing a protective barrier and maintaining homeostasis.

Front

What is Homeostasis?

Back

The process by which living organisms maintain a stable internal environment despite changes in external conditions.

Front

What is Passive Transport?

Back

The movement of molecules across a cell membrane without the use of energy, typically from an area of higher concentration to an area of lower concentration.

Front

What is Exocytosis?

Back

A process by which a cell expels materials in vesicles that fuse with the cell membrane, releasing their contents outside the cell.

Front

What is Osmosis?

Back

The diffusion of water molecules through a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration.

Front

How do cells maintain Homeostasis?

Back

By regulating the movement of substances in and out of the cell, ensuring a balanced internal environment.

Front

What role do proteins play in the Cell Membrane?

Back

Proteins assist in transporting substances across the membrane and can act as receptors for signaling molecules.

Front

What is a Vesicle?

Back

A small, membrane-bound sac that transports materials within a cell or to the cell membrane for exocytosis.