Lovely LipidsLovely Lipids

(Or everything you ever (Or everything you ever wanted to know about fat & wanted to know about fat &

its relativesits relatives

Two Types of LipidsTwo Types of Lipids

I. Cholesterol (steroid) FamilyI. Cholesterol (steroid) Family

II. Fat FamilyII. Fat Family

All LipidsAll Lipids

Are Are hydrophobichydrophobic

Are composed entirely of C,H,O Are composed entirely of C,H,O atomsatoms

I. CholesterolI. Cholesterol

Cholesterol & FriendsCholesterol & Friends

Q: Why do we need cholesterol?Q: Why do we need cholesterol?

1)1) Component of animal cell Component of animal cell membranesmembranes

2)2) ??

Q: Why do we need Q: Why do we need cholesterol?cholesterol?

(hint)(hint)

Q: Why do we need Q: Why do we need cholesterol?cholesterol?

Cholesterol is the “Steroid Mama”:Cholesterol is the “Steroid Mama”:

Cholesterol is the precursor ofCholesterol is the precursor of• EstrogenEstrogen

• ProgesteroneProgesterone• TestosteroneTestosterone

• CortisolCortisol

II. TriglyceridesII. Triglycerides(Fats, oils, waxes)(Fats, oils, waxes)

A Triglyceride A Triglyceride molecule = A Fat molecule = A Fat MoleculeMolecule

II. TriglyceridesII. Triglycerides

II. TriglyceridesII. Triglycerides

What’s the differences between What’s the differences between saturated and unsaturated fats?saturated and unsaturated fats?

Saturated – carries as many H as Saturated – carries as many H as possiblepossible

Unsaturated – double bond replaces HUnsaturated – double bond replaces HPolyunsaturated – more than 1 double Polyunsaturated – more than 1 double

bondbond

Saturated vs. UnsaturatedSaturated vs. Unsaturated

SaturatedSaturated UnsaturatedUnsaturated

Benefits of Fats & Benefits of Fats & CholesterolCholesterol

Fats (Triglycerides)Fats (Triglycerides) CholesterolCholesterol