Explore Cell Membrane Functions

The function of the plasma membrane is....

• to regulate what enters and leaves the cell.
• fight bacteria and viruses that enter the cell.
• provide rigid support and protection to the cell.
• make sure each cell can move

True or False:  Regulating what enters and leaves the cell helps the cell maintain homeostasis. 

• True
• False

What forms the channels and pumps in the phospholipid bilayer?

• Carbohydrates
• Proteins
• Hydrophilic heads 
• Lipids

Most of the cell membrane is made of...

• Lipids
• Carbohydrates
• Proteins
• Nucleic acids

True or False: Phospholipids can move laterally along the plane of the membrane. 

• True
• False

Hydrophobic region of the cell membrane?

• E
• B
• C
• A 

Part of the plasma membrane responsible for cell recognition... 

• C
• E
• B
• D

Phospholipid heads are...

• Hydrophobic
• Hydrophilic

What is the name for a molecule that has a polar head region and a hydrophobic tail region?

• Bihydrophicity
• Amphipathic
• Hydrophilic
• Dipolarity

Why are unsaturated fatty acids able to best keep the membrane more "fluid"?

• Unsaturated fatty acids are more polar than saturated fatty acids. 
• The kinks in the tails of the unsaturated fatty acids prevent a dense network of lipids. 
• Unsaturated fatty acids are solid at room temperature. 
• The kinks in the tails of the unsaturated fatty acids make the region more dense.