Cell Membrane and Transport Mechanisms

Which statement best describes the cell membrane?

• The protective outer layer that controls what enters and leaves the cell.

• Stores information on DNA molecules / Directs and controls the activities of the cell.

• A folded membrane that moves materials around inside cells / Also acts as the site of manufacturing materials needed by the cell.

• The smallest organelle with a huge job / Makes proteins, which are the building blocks of the body.

Tags

NGSS.MS-LS1-2

What does the "fluid mosaic model" mean about the cell membrane?

• It can dissolve into fluid.

• It looks like a flexible pattern made up of different parts.

• Somebody else should name these things.

• The cell is mostly made of mosaic molecules.

What forms the channels and pumps in the phospholipid bilayer?

• Carbohydrates

• Hydrophilic heads

• Lipids

• Proteins

What is NOT TRUE about the cell membrane?

• Contains digestive enzymes

• It controls what enters and leaves the cell

• Phospholipid bilayer

• Semipermeable

Which cell membrane component is responsible for cell to cell interactions?

• carbohydrates

• cholesterol

• phospholipids

• proteins

What is the function of a cell’s selectively permeable membrane?

• It helps the cell to manufacture proteins.

• It packages and stores most of the material in a cell.

• It regulates the amount of ATP the cell produces.

• It regulates what materials enter and leave the cell.

Tags

NGSS.MS-LS1-2

Regulating what enters and leaves the cell helps the cell maintain homeostasis.

• True

• False

Tags

NGSS.HS-LS1-3

What does a cell need to transport particles by active transport?

• Channels

• Energy

• Sun

• Wind

Osmosis uses a channel protein called AQUAPORIN. What type of transport is this? *Think!

• Active Transport

• Diffusion

• Endocytosis

• Facilitated Diffusion

What is one major difference between passive and active transport?

• Active transport uses energy; passive transport does not.

• Both types of transport use energy.

• Passive transport uses energy; active transport does not.

• No difference. They are both the same.