Cell Membrane Structure

Question 1

Purpose of cell membrane:

Answer 1

Controls the movement of substances between the extracellular fluid outside the cell and intracellular fluid inside the cell.

Question 2

Cell membrane functions:

Answer 2

• Receiving signals from outside the cell for internal cellular activities
• Imports and exports molecules
• Movement of the cell

Question 3

Fluid Mosaic Model

Answer 3

-Describes the structure of the cell membrane.

• The cell membrane is made up of phospholipid bilayer
• Other molecules such as proteins are scattered throughout the bilayer.

Question 4

Phospholipid Bilayer

Answer 4

• Phospholipid molecules have a hydrophilic head and two hydrophobic tails.
• The head is made from the phosphate group, the tails are made up of saturated and unsaturated fatty acids.

Question 5

Into Cell

Answer 5

• Protein
• Oxygen
• Water
• Nutrients

Question 6

Out of Cell

Answer 6

• Carbon dioxide
• Urea
• Uric acid