Cell Transport & Diffusion

Osmosis is the movement of _____ across a membrane.

• food
• energy
• oxygen
• water

Which is true about active transport?

• It requires energy
• it does not require energy
• It moves substances down the concentration gradient
• it moves material from high to low concentration

The concentration of water is higher in the soil than in plant root cells. Water moves into root cells of a plant by...

• Facilitated Diffusion
• Simple Diffusion
• Active Transport
• Osmosis

Due to the higher concentration of oxygen in the air than your blood, oxygen goes from the lungs into the red blood cells by....

• Facilitated Diffusion
• Simple Diffusion
• Active Transport
• Osmosis

This cell structure helps organisms maintain homeostasis by controlling what substances may enter or leave cells.

• vacuole
• nucleus
• cell membrane
• cell wall

Passive transport requires no

• concentration gradients
• osmosis
• motion
• energy

What type of transport is illustrated?

• facilitated diffusion
• active transport
• diffusion
• osmosis

Which way would the purple molecules move through the semi permeable membrane?

• From the  A side  to the B-side
• From the B side to the A side
• None of the purple molecules would move

Large molecules and ions can easily pass through the cell membrane without any help

• true- they pass right through
• false- they need a protein channel 

The picture is an example of...

• active tranport
• passive transport
• diffusion
• osmosis