LIPIDS<3 Flashcards
(25 cards)
what are lipids?
essencial macromolecules of all living organisms
lipids have a widley varied structure which include?
- FATS (trigylceride)
- OILS (triglyceride)
- PHOSPHOLIPIDS ( cell membrane)
- STERIODS (chemical signalling)
- CARATENIODS (pigments)
what are lipids soluble in?
non polar organic solvent
can all cells use fatty acids?
NO
when do fatty acids have an increased use?
during starvation, exercise, in suckling period and diabetes millitus
what do elcosanoid actions include?
mediation of pain and inflamation
what are 20 carbon atoms called?
elcosanoid
A fatty acid is SATURATED when it has?
single bonds
A fatty acid is UNSATURATED when it has?
one or more double bond
fatty acids consist of ——- —- group at head and —- —-
carboxylic acid (COOH) and carbon chain
properties of fatty acids depend on?
number of double bonds in hydrocarbon chain
An unsaturated configuration of double bonded carbon atoms are either — or —–
CIS or TRANS
a saturated fatty acid has what properties at 22 degrees
waxy solid
a unsaturated fatty acid has what properties at 22 degrees
liquid
what influences melting point?
length of hydrocarbon chain and degree of saturation
what interactions between neighbouring tails increase with length
vanderwaals
how to name fatty acids
number of carbon atoms in chain ; number of double bonds
how to identify full name?
identify first carbon involved in double bond
triglycerides transport what around the body
dietry and synthesised fatty acids
what is a triglyceride?
fatty acid storage in adipose tissue
what does triglyceride consist of?
glycerol with fatty acid attached to each OH group
is triglyceride hydrophobic or hydrophilic
hydrophobic
what are MICELLES, LIPOSOMES, BILAYERS
semi permanent barrier
allows for diffusion and transport across bilayer
micelles, liposomes and bilayers use what transport to get across proteins using transport proteins?
passive and active
