Topic 2.2 The Plasma Membrane

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

Tags

NGSS.MS-LS1-2

Which type of biological macromolecule is the main component of the plasma membrane?

• carbohydrate

• lipid

• protein

• nucleic acid

This image is an example of a phospholipid. Which part of a phospholipid is HYDROPHOBIC?

• the phosphate "head"

• the lipid "tails"

This image is an example of a phospholipid. Which part of a phospholipid is HYDROPHILIC?

• the phosphate "head"

• the lipid "tails"

Tags

NGSS.MS-LS1-2

Where can carbohydrates be found when part of a plasma membrane?

• On the outside of the membrane

• On the inside of the membrane

• Embedded part of the way into the membrane

• Embedded the whole way through the membrane

• All of the above

Where can PROTEINS be found when part of a plasma membrane?

• On the outside of the membrane

• On the inside of the membrane

• Embedded part of the way into the membrane

• Embedded the whole way through the membrane

• All of the above

Tags

NGSS.MS-LS1-2

What is the function of cholesterol in a plasma membrane?

• To make the membrane flexible

• To increase the fluidity of cell membrane

• To attract water molecules

• To allow nutrients and other essential molecules into the cell

What does "hydrophobic" mean?

• water loving, associates with water

• water fearing, does not associate with water

• a world war II submarine

• an example would be solutes like sugar or salt

Tags

NGSS.MS-PS1-1

What does "hydrophilic" mean?

• water loving, associates with water

• water fearing, does not associate with water

• a world war II submarine

• an example would be solutes like oil or fat

Tags

NGSS.MS-PS1-2

The cell membrane is _______________ permeable.

• selectively

• somewhat

• physically

• ionically

Tags

NGSS.MS-LS1-2