Diffusion- Bio/BioMed

The condition in which all acting influences are balanced.

• equilibrium

• dynamic equilibrium

• net movement

What happens to the coffee particles when coffee is added to hot water?

• They sink to the bottom of the cup

• They spread out

• They clump together

When does diffusion stop?

• After a day and a night

• When the particles are evenly spread out

• When there are no particles left

• When all the particles leave the system

The picture  is an example of _________________.

• isotonic
• diffusion
• osmosis
• active transport

The picture below is an example of _________________.

• osmosis
• isotonic
• diffusion
• active transport

Which of the following describes a state of equilibrium?

• A group of molecules that have stopped moving completely

• A room whose temperature is consistent throughout

• Carbon dioxide bubbles escaping from a soda bottle when it's opened

• A tree's roots absorbing nutrients from the soil

Why is diffusion so important in biology?

• It's the basic power source for most types of cells

• It allows substances to move across cell membranes

• It prevents toxins from entering our bodies

• Without diffusion, cell division could not take place

Where is there a low concentration of dye?

• at the bottom of cup

• in the color

• at the top of cup

• no concenteraion gradient

There are 24 molecules inside this cell. AFTER diffusion, how many molecules would be inside and how many would be outside?

• There would be 12 inside and 12 outside

• There would be 0 inside and 24 outside

• The cell will stay the same with 24 inside

• There will be 20 inside and 4 outside

Why does the tea move out of the tea bag and into the water?

• The warm water forces it out of the tea bag

• There is equal concentration of water and tea

• There is a higher concentration of tea in the bag and less in the water

• There is a lower concentration of tea in the bag and more in the water