mmmm… lipids!. what’s the connection? fats can be … both good and bad!

Mmmm…Mmmm…

LIPIDS!

What’s the connection?What’s the connection?

FATS CAN BE …FATS CAN BE …BOTH GOOD AND BAD!BOTH GOOD AND BAD!

From good to badFrom good to bad

Why are fats useful in Why are fats useful in the body?the body?

How do fats negatively How do fats negatively impact the body?impact the body?

Big Questions:

Functions of Lipids in Functions of Lipids in Body:Body:

1. 1. Long Term Energy StorageLong Term Energy Storage 2. 2. Insulation Insulation (keep warm)(keep warm) 3. 3. Cushion OrgansCushion Organs 4. Structural4. Structural

cell membranescell membranes 5. Chemical messengers 5. Chemical messengers

hormones eg steroids!hormones eg steroids!

Lipids Lipids Sec. 2.6 pg 34-35Sec. 2.6 pg 34-35

Key Characteristics:Key Characteristics:NOT SOLUBLE in WATERNOT SOLUBLE in WATERIncludes 4 main typesIncludes 4 main types””

Fatty acidsFatty acids Neutral fatsNeutral fats PhospholipidsPhospholipids SteroidsSteroids

Animal sources of fat: lard and butterAnimal sources of fat: lard and butter SOLIDSOLID at room temp. at room temp.

Plant sources of fat: corn oil and canola oilPlant sources of fat: corn oil and canola oil LIQUIDLIQUID at room temp. at room temp.

Synthesis of FatsSynthesis of FatsFig 2.22 pg 34Fig 2.22 pg 34

Synthesis of FatsSynthesis of Fats

Involves condensation synthesis reactionsInvolves condensation synthesis reactions 1 1 GLYCEROL GLYCEROL molecule reacts with 3 molecule reacts with 3

FATTY ACIDSFATTY ACIDS Glycerol has three Glycerol has three HYDROXYL HYDROXYL groups (-groups (-

OH)OH) (OH) group reacts with the (COOH) group (OH) group reacts with the (COOH) group

of a of a FATTY ACIDFATTY ACID to form to form 1 1 TRIGLYCERIDE TRIGLYCERIDE (fat) (fat)

This process releases 3 molecules of waterThis process releases 3 molecules of water