Active and Passive Transport

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 (ATP).

Front

What is Passive Transport?

Back

The movement of molecules across a cell membrane without the use of energy, occurring from a region of higher concentration to a region of lower concentration.

Front

Define Diffusion.

Back

The movement of particles from an area of high concentration to an area of low concentration until equilibrium is reached.

Front

What is Facilitated Diffusion?

Back

A type of passive transport that uses transport proteins to help molecules cross the cell membrane.

Front

What happens to an animal cell in a hypertonic solution?

Back

The cell will shrink as water moves out of the cell to the area of higher solute concentration.

Front

What is Osmosis?

Back

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 the difference between Active and Passive Transport?

Back

Active transport requires energy (ATP) to move substances against their concentration gradient, while passive transport does not require energy.

Front

What is a Hypotonic Solution?

Back

A solution with a lower concentration of solutes compared to the inside of a cell, causing the cell to swell as water enters.

Front

What is an Isotonic Solution?

Back

A solution with the same concentration of solutes as the inside of a cell, resulting in no net movement of water.

Front

What is the role of transport proteins in facilitated diffusion?

Back

Transport proteins assist in the movement of larger or polar molecules across the cell membrane that cannot pass freely.