Diffusion and Osmosis

The cell membrane helps to maintain homeostasis by ...

• regulating what enters and leaves the cell.

• fighting foreign substances that enter the cell.

• providing a rigid support system for the cell.

• assisting the cell in movement

Tags

NGSS.HS-LS1-3

What does "bilayer" mean?

• one layer

• two layers

• laminated

• bilateral

Most of the cell membrane is made of...

• Lipids

• Carbohydrates

• Proteins

• Nucleic acids

Hydrophobic region of the cell membrane?

• E

• B

• C

• A 

Hydrophilic portion of cell membrane?

• A

• C

• D

• E 

The structure in the membrane that would most likely serve as a carrier protein is ...

• Structure A

• Structure B

• Structure C

• Structure D

The main difference between passive transport and active transport is ...

• passive transport requires energy

• active transport moves substances "down" their concentration gradient

• active transport requires energy

• passive transport moves substances "up" their concentration gradient

When solutes diffuse, they move ....

• from low concentration to high concentration

• from high concentration to low concentration

• "up" the concentration gradient

• randomly

Tags

NGSS.HS-PS1-5

Osmosis is strictly about ....

• the movement of solutes

• the movement of solutes across a membrane

• the movement of gases

• the movement of water across a membrane

Particles diffuse naturally due to ...

• gravity

• the kinetic energy of the particles

• attractive forces between the atoms in the different particles

• the motion of the Earth

Tags

NGSS.HS-PS3-2