Cell Membrane

What is NOT TRUE about the cell membrane

• It controls what enters and leaves the cell
• Semipermeable
• Phospholipid bilayer
• Contains digestive enzymes

Most of the cell membrane is made of...

• Lipids
• Carbohydrates
• Proteins
• Nucleic acids

What is embedded in the phospholipid bilayer?

• proteins
• salt
• water
• trapped animals

What forms the channels and pumps in the phospholipid bilayer?

• carbohydrates
• proteins
• hydrophilic heads 
• lipids

Hydrophilic means...

• water-loving
• water-fearing
• nonpolar
• lipid soluble

Hydrophobic region of the cell membrane?

• E
• B
• C
• A 

Hydrophilic portion of cell membrane?

• A
• C
• D
• E 

A phospholipid has 2 parts. What are they called? 

• Hydrophilic Head, Hydrophobic Tail 
• Hydrophobic Head, Hydrophilic Tail 

What is diffusion?

• when molecules move 
• when molecules move from a high concentration to a low.
• no movement 
• molecules move everywhere

The picture below is an example of _________________.

• osmosis
• isotonic
• diffusion
• active transport