diffusion

diffusion

Diffusion is the movement of molecules from an area of high concentration of the molecules to an area with a lower concentration. The difference in the concentrations of the molecules in the two areas is called the concentration gradient.

Open Ended

How are proteins used in active transport?

Multiple Choice

What is diffusion?

• when molecules move 
• when molecules move from a high concentration to a low.
• no movement 
• molecules move everywhere

Multiple Choice

The picture below is an example of _________________.

• osmosis
• isotonic
• diffusion
• active transport

Multiple Choice

During osmosis

• water moves from high to low concentration
• large or oddly shaped molecules move across a cell membrane
• water moves when energy is used
• proteins are built

Multiple Choice

The general name for movement of substances across cell membranes without need of energy input

• passive transport

• active transport

Multiple Choice

What is a difference between diffusion and facilitated diffusion?

• movement of particles from [high] to [low]

• a protein "helper"

• movement of particles from [low] to [high]

• energy

Multiple Choice

Passive Transport uses ____ energy

• no

• a lot of

• a little bit of

• some

Multiple Choice

Passive Transport is the movement of particles across the membrane from an area of [ ___ ] to an area of [ ___ ]

• high to low

• low to high

• low to low

• high to high

Multiple Choice

Diffusion & Facilitated Diffusion are both __________ transport.

• Passive

• Active

• Easy

• Free

Multiple Choice

Which gases move into and out of the blood at the lungs by diffusion

• Nitrogen and Oxygen

• Oxygen and Carbon Dioxide

• Nitrogen and Carbon Dioxide

• Argon and Nitrogen