CC Diffusion and Osmosis CC Cooper

How do cells exchange materials with the environment? 

• Across the nucleus

• Across the cell membrane

• By magnetism

In the process of diffusion, particles move from an area of ______ to an area of ______.

• low concentration  high concentration

• high concentration  low concentration

• solid  gas

Particles will continue to diffuse (spread out) until _____.

• they are completely gone

• they have built up in another location

• they are evenly distributed

The _(A)_ we breathe in diffuses from our lungs into the bloodstream.  The _(B)_ we breathe out has moved by diffusion from our bloodstream into our lungs.

• (A) oxygen; (B) carbon dioxide

• (A) carbon dioxide; (B) oxygen

How do amino acids (building block of proteins) get into our bloodstream? 

• By diffusion through the small intestine

• By active transport through the small intestine

• By diffusion in our mouth

The term "osmosis" applies to the movement of ____ into and out of cells.

• glucose

• carbon dioxide

• water

Osmosis is the movement of water from a _____ to _____ concentration of water molecules.

• High to Low

• passive to active

• Low to High

When water moves OUT of the cell by osmosis, an animal cell (like one of your blood cells) becomes ___.

• shriveled and shrunken

• full and plump

When water moves INTO the cell by osmosis, cells swell up and expand.  What cell structure prevents plant cells from bursting?

• cell membrane

• cell wall

• nucleus

• chloroplast