Cell Membrane

Define cell (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

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 HYDROPHILIC?

• the phosphate "head"

• the lipid "tails"

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

Which process describes the movement of water across a cell membrane from an area of low solute concentration to an area of high solute concentration?

• Osmosis

• Diffusion

• Active transport

• Endocytosis

Which process involves the movement of water across a semipermeable membrane from an area of low solute concentration to an area of high solute concentration?

• Diffusion

• Osmosis

• Active Transport

• Endocytosis

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

• On the outside of the membrane

• On the inside of the membrane

• Embedded the whole way through the membrane

• All of the above

What is the "big idea" of the fluid mosaic model of plasma membranes?

• the plasma membrane creates a specialized FLUID that looks like a MOSAIC.

• the plasma membrane is a MOSAIC.

• the fluid mosaic model is NOT related to the plasma membrane.

• a plasma membrane is a MOSAIC of components that move FREELY and FLUIDLY.

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

Tags

NGSS.MS-LS1-2

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

• the phosphate "head"

• the lipid "tails"