Biochem Phospholipids, Cholesterol, lipoproteins, steroid hormones
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What has the structure of a DAG with a phosphate on carbon 3?
Glycerophospholipids AKA phosphoglycerides
What are the four main functions of glycerophospholipids?
- Cell membrane component
- intracellular messengers
- Anchors proteins to cell membranes
- Lung surfactant (prevents alveoli from collapsing)
What are the two types of phosphoglycerides?
- Plate-activating factor
What is the backbone of sphingolipids aka sphingomyelin?
Sphingosine (amino acid)
What originates from unsaturated fatty acids with 20 caarbons?
How do eicosanoids differ from hormones?
- 1. they are made in small amounts in all tissues
- 2. act locally, not transported like hormones
- 3. Not stored
- 4. G-protein mechanism
Leukotrines = ?
What enzyme is present in most tissues and contributes to the health of gastric tissues?
What enzyme is present in fewer tissues and are part of the immune/inflamatory response?
What acts as the structural component of all membranes and is the precursor to bile acids, steroid hormones, and vitamin D?
What is the regulatory enzyme in cholesterol synthesis?
HMG CoA reductase
Where does cholesterol synthesis occur?
What is needed for cholesterol synthesis?
What does A Happy Man Is Singing Carols stand for?
- Acetyl CoA
- HMG CoA
What is a spherical macromolecular complexes of lipid and protein?
What is the main function of Lipoproteins?
Keep lipids soluble and transport them to plasma
What are TAGs transported from intestine to other tissues?
Tags transported to fat tissue
Cholesterol transported to peripheral tissues?
what do steroid hormones always start with?
What are the first three steps in steroid synthesis?
Cholesterol => pregnenolone => Progesterone
What is the parent compound of all steroid hormones?
Pregnenolone or progesterone
What would you like to do?
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