Cell Membrane and Passive Transport

What structure is depicted in this image?

• phospholipid bilayer

• cell wall

• ER

• Golgi

Tags

NGSS.MS-LS1-2

The primary 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 through its environment.

Tags

NGSS.MS-LS1-2

What does "bilayer" mean?

• one layer
• two layers
• laminated
• bilateral

Most of the cell membrane is composed mostly of:

• lipids (phospholipids)

• carbohydrates

• proteins

• nucleic acids

What molecule forms the channels and pumps in the phospholipid bilayer?

• carbohydrates
• proteins
• hydrophilic heads 
• lipids

Hydrophilic means:

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

Identify the hydrophobic region of the cell membrane.

• E
• B
• C
• A 

Tags

NGSS.MS-LS1-2

Identify the hydrophilic portion of cell membrane.

• A
• C
• D
• E 

Tags

NGSS.MS-LS1-2

___________ form the two layers of the plasma membrane. 

• Carbohydrates 
• Proteins 
• Phospholipids 
• Cholesterol

Tags

NGSS.MS-LS1-2

The _______________ of the phospholipids in a cell membrane face inward towards each other.

• heads

• tails

• stems

• sticks

Tags

NGSS.MS-LS1-2