Lipids

Question 1

Five types of lipids types in humans

Answer 1

-Fatty acids
-Triglycerides
-Phospholipids
-Eicosanoids
-Steroids

Question 2

Fatty acid (Lipid)

Answer 2

-Chain of 4-24 carbon atoms
-Carboxyl group on one end and methyl group on the other, hydrogen bonded along the sides
-Precursors of triglycerides and source of energy

Question 3

Triglycerides (lipids)

Answer 3

-3 fatty acids bonded together to glycerol molecule

function- energy storage, insulation, shock absorbtion

Question 4

Phospholipids (lipids)

Answer 4

-Triglyceride with one fatty acid replaced by a phosphate group
-Major component of cell membranes
-Amphiphilic (fatty acid tails hydrophobic, phosphate head is hydrophilic)

Question 5

Amphiphilic meaning

Answer 5

A molecule having both hydrophobic and hydrophilic regions

Question 6

Eicosanoids

Answer 6

-Derived from arachidonic acid (fatty acid)
-Hormone like chemical signals between cells
-includes prostaglandins

function (role in)
-inflammation
-blood clotting
-hormone action
-labor contractions
-blood vessel diameter

Question 7

Steroids

Answer 7

-Major component is cholesterol
-important component of cell membranes
-produced only in animal liver cells
-naturally produced by us

It is a lipid with carbon atoms in four rings

Question 8

where are steroids derived from

Answer 8

-Cholesterol
-Cortisol
-Progesterone
-Estrogens
-Testosterone
-Bile acids

Question 9

Hydrophobic organic molecule, composed of carbon, hydrogen and oxygen

Answer 9

Lipids