Cell Structure and Cell Transport

The cell membrane is selectively permeable, which means...

• Everything can enter and nothing can leave

• Certain things can enter while others cannot

• Nothing can enter the cell at all

• Only glucose can enter

Which transport does not require energy?

• Passive
• Active 

What is Osmosis?

• equal concentration

• diffusion of water through a selectively-permeable membrane

• movement of sugar through a membrane

• non-polar tail

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

If you put a plant in salt water it will ...

• swell because water diffuses into the cells

• Nothing will happen

• shrivel because water diffuses out of the cell

Tags

NGSS.MS-LS1-2

NGSS.MS-LS1-5

Diffusion is the movement of

• proteins from low to high concentration

• water from low to high concentration

• sugar from high to low concentration

• particles from high to low concentration

The movement of molecules against a concentration gradient

• simple diffusion

• facilitated diffusion

• active transport

• osmosis

Some celery sticks were placed in distilled water. What type of solution are they in? What will happen to the celery sticks?

• hypotonic, the celery sticks increase in size

• hypertonic, the celery sticks reduce in size

• isotonic, the celery sticks remains in size

Figure shows three different plant cells immersed in solution with different concentration. Choose a normal healthy plant cell in the figure.

• Cell A

• Cell B

• Cell C

Tags

NGSS.MS-LS1-2

Which of the following substances would have the most trouble crossing the membrane by diffusing through the bilayer?

• water

• oxygen

• carbon dioxide

• a sodium ion