Cell (Plasma) Membrane

Function

• Regulates what enters and leaves the cell
• Provides protection & support

Components of Membrane

• Phospholipids
• Glycoprotein
• Glycolipid
• Cholesterol
• Protein Channel (Integral)
• Peripheral Proteins

Phospholipids

Phospholipid

Phospholipids

• hydrophilic heads like water
• hydrophobic tails hate water
• Form a lipid bilayer in the membrane
• Draw a phospholipid and label it.
• made up gycerol and 2 fatty acids

Cholesterol

Cholesterol is wedged between the phospholipids

Cholesterol keeps the membrane fluid

Glycolipid

Function is to keep the membrane stable & cell recognition

Glycoprotein

Function of Glycoprotein

• Cell Recognition
• Intercellular attachment
• Cell identity markers (antibody processing)

Protein Channel

Function of Channel Protein

• Facilitates the movement of substances across the membrane
• Participates in facilitated diffusion and active transport

Peripheral Proteins

Function of Peripheral Proteins

• enzymes
• transports hydrophobic molecules
• Electron carriers

Pick up the worksheet