Where is there a low concentration of dye?

• at the bottom of cup
• in the color
• at the top of cup 
• no concentration gradient

Permeable means

• things can pass through
• the concentration levels are different
• it is permanent
• things are stuck

The picture below is an example of _________________.

• osmosis
• isotonic
• diffusion
• active transport

Osmosis is the movement of _____ across a membrane.

• food
• energy
• oxygen
• water

What is diffusion?

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

Passive transport requires no

• concentration gradients
• osmosis
• motion
• energy

What is the difference between active and passive transport?

• Active does not need energy and passive uses ATP (energy)
• Active uses ATP (energy) and passive does not need energy
• Active stores transport proteins and passive releases 
• Active uses hormones and passive does not 

Which type of transport requires an input of energy?

• Passive Transport
• Osmosis
• Simple Diffusion
• Active Transport

Diffusion is a form of...

• Active Transport

• Passive Transport

Which type of transport uses protein channels to help the particles move across the cell membrane?

• endocytosis

• osmosis

• facilitated diffusion

• exocytosis