1. Chapter 15 15.5 Glycerophospholipids
SWBAT:
Describe the characteristics of glycerophospholipids

2. What are Glycerophospholipids?
Similar to triglycerides except one hydroxyl group is replaced by the ester of phosphoric acid and an amino alcohol
Bonded through a phosphodiester bond
Triglycerides
Glycerophospholipids

3. Amino Alcohols Three amino alcohols found in glycerophospholipids are:
choline
serine
ethanolamine

4. Lecithins Lecithins contain choline
Fatty Acids can be same, different, saturated, unsaturated or mixture
Abundant in:
brain tissue
nerve tissue
egg yolks
wheat germ
yeast

5. Cephalins Cephalins contain ethanolamine and sometimes serine
Abundant in:
brain tissue
nerve tissue
egg yolks
wheat germ
yeast

6. Polar? Hydrophobic Tails Hydrophilic Head Group
Contain both polar and nonpolar regions
Ionized alcohol and phosphate portion is called “the head”
Can hydrogen bond with water
Two Fatty Acids represent “the tail”

7. Polar and Nonpolar Regions
Most abundant in lipids in cell membrane
Polar Head
Nonpolar Tails

8. Homework
Chapter 15.5
Pg 515
#15.38 – 15.42

9. Chapter 15 15.7 Cell Membranes
SWBAT:
Describe the composition and function of the lipid bilayer in cell membranes

10. Cell Membrane Composed of phospholipid bilayer
Polar head & nonpolar tails
Semipermeable – items can enter and leave

11. Lipid Bilayer Double row arrangement of phospholipids
Hydrophilic polar heads align on outer edges of membrane
Hydrophobic nonpolar tails move to center

12. Fluid Mosaic Model Lipid bilayer contains unsaturated Fatty Acid
Cis double bonds causes a non-rigid structure
In liquid like bilayer:
Proteins
Carbohydrates
Cholesterol

13. Homework
Chapter 15.7
Pg 524 – 525
#15.56 – 15.62