Passive and Active Transport

Front

What is passive transport?

Back

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

Front

What is active transport?

Back

Active transport is the movement of substances across a cell membrane using energy, often against a concentration gradient.

Front

Define osmosis.

Back

Osmosis is 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

What is facilitated diffusion?

Back

Facilitated diffusion is a type of passive transport that uses transport proteins to help move substances across the cell membrane.

Front

What is the difference between diffusion and osmosis?

Back

Diffusion refers to the movement of solute particles from an area of higher concentration to an area of lower concentration, while osmosis specifically refers to the movement of water.

Front

What happens to a cell in a hypertonic solution?

Back

In a hypertonic solution, water moves out of the cell, causing it to shrink.

Front

What happens to a cell in a hypotonic solution?

Back

In a hypotonic solution, water moves into the cell, causing it to swell and potentially burst.

Front

What is isotonic solution?

Back

An isotonic solution has the same concentration of solutes as the cell, resulting in no net movement of water.

Front

What is endocytosis?

Back

Endocytosis is an active transport process where cells engulf substances from the outside environment into vesicles.

Front

What is exocytosis?

Back

Exocytosis is an active transport process where cells expel materials in vesicles to the outside environment.