Lipids 2 Flashcards
What type of molecules can pass through the lipid bilayer?
Small, non-polar molecules, down their concentration gradient.
Where does digestion and absorption of dietary lipids occur?
Small intestine.
What tissues are fatty acids from TAGs delivered to?
Muscle and adipose tissues.
How many times more energy do TAGs yield compared to glycogen?
2.5 times per gram.
How are fatty acids converted into energy?
Released from TAGs via lipolysis by lipase. This releases 3 fatty acid chains and a glycerol molecule.
Released into bloodstream and bound to serum albumin to be carried to tissues.
Undergo oxidation to release acetyl-CoA.
What % of fatty acids released by lipolysis are re-esterified to form TAGs?
Approx. 75%
What are the classes of eicosanoid hormones?
Prostaglandins, thromboxanes, leukotrienes.
What type of hormone are eicosanoids?
Paracrine - act on nearby cells.
What are the classes of steroid hormones?
Glucocorticoids, sex hormones, mineralocorticoids, synthetic steroids.
What type of hormone are steroid hormones?
Endocrine - act on tissues via the bloodstream.
