Cell Membrane

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

This cell organelle helps organisms maintain homeostasis by controlling what substances may enter or leave cells.

• vacuole

• nucleus

• cell membrane

• cell wall

Tags

NGSS.MS-LS1-2

What is NOT TRUE about the cell membrane?

• It controls what enters and leaves the cell

• Semipermeable

• Phospholipid bilayer

• Contains digestive enzymes

Define plasma membrane

• lipid that helps minimize effects of temperature

• only on the outer surface of the plasma membrane and are attached to proteins or lipids; form distinctive cellular markers

• flexible boundary of a cell that separates a cell from its surroundings

• may extend partway into the plasma membrane, cross the membrane entirely, or be loosely attached to its inside or outside face

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

• True

• False

Tags

NGSS.HS-LS1-3

___________ have 2 functions in the cell membrane.
1.) They act like gatekeepers, only let certain things in. 
2.) Enzyme receptors embedded in the membrane.

• Carbohydrates 

• Proteins 

• Phospholipids 

• Cholesterol

Which of the following is responsible for getting large or charged (polar) molecules across the cell membrane?

• E

• B

• C

• D

Something is ___________ ____________
when some molecules can cross the membrane while others cannot. 

• Selectively (or Semi) Permeable 

• Totally Transparent

• Liquid Licorice 

• Heavily Patrolled 

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

• All materials can enter and leave the cell

• Certain things can enter while others cannot

• The cell manually sorts through all materials

• Only certain cells can interact with the cell.

Tags

NGSS.MS-LS1-2

In a lipid bilayer, ___________ fatty acid tails face each other within the bilayer and form a region that excludes water.

• A. Hypotonic

• B. Hypertonic

• C. Hydrophilic

• D. Hydrophobic