Active and Passive Transport

Front

What is diffusion?

Back

Diffusion is the movement of particles from an area of higher concentration to an area of lower concentration until they are evenly distributed.

Front

When does diffusion stop?

Back

Diffusion stops when the particles are evenly spread out.

Front

What does permeable mean?

Back

Permeable means that things can pass through.

Front

What is osmosis?

Back

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

Front

What is an isotonic solution?

Back

An isotonic solution is one where the concentration of solutes is the same inside and outside the cell, resulting in no net movement of water.

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 along their concentration gradient.

Front

What is an example of diffusion?

Back

An example of diffusion is the spreading of perfume in a room.

Front

Where is there a low concentration of dye in a cup?

Back

There is a low concentration of dye at the bottom of the cup.

Front

What is a concentration gradient?

Back

A concentration gradient is the difference in the concentration of a substance between two areas.

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.