Biol CHem chap 11 and 12

Membrane Lipid

1.) Phospholipids

membrane lipids are ampathatic

Membrane Lipid

2.) Glycolipids

found on outer surface of cell membrane, cell to cell interactions

Membrane Lipids

3.) Choloestrol

a membrane lipid for steriod hormones (helps with fluiduty)

Classes of Lipids

1.) Triacylglycerol

fats/ oils, storage lipid

Classes of Lipids

2.) Phosolipids

Classes of Lipids

3.) Steriods

Classes of Lipids

4.) Sphingolipids

common in nerve cells

Classes of Lipids

5.) waxes

Fatty Acids

long chains of hydrocarbons contaning a carboxilic carbon function at the end

phospholipids are made up of

fatty acids, platform, phosphate, alcohol

unsaturated fatty acids have a ______ melting point than daturated fatty acids do

lower

fatty acids have a ______and _______ part

polar and nonpolar

more double bonds, melting point is ______

lower, bond is weaker meaning easier to break

double bonds are seperated by _____ carbon.

1

Fat tissue is called

adipose tissue

_______ bonds attaches fatty acid to glycerol

ester

triglycerides are composed of

3 fatty acid molecules and 1 glygeran molecule

a saturated fatty acid is _____ at room temp

solid

unsaturated fatty acid is _____ at room temp

liquid

Integral protein

Transports Protein (inside)

Perpipheral Membrane Protein

Cell to cell communication

Fluidity

low temp, stay fluid

_____ carbon in a chain, ______ fluid

less, more

ion channels are ______ transport systems

positive, allows specific and rapid transport of ions down their concentration gradient

more polar is ____ to cross cell membrane

harder

less polar is _____ to cross cell membrane

easier

proteins help ______ ______ or ______ molecules

transfer charged or uncharged

Non polar molecules can cross lipid bilayer via

simple diffusion

ions and polar molecules can NOT pass, require _______ proteins

transport

Facilitated diffusion/ passive transport-

transport of a solute from high to low concentration requires no energy

active transport-

Transport of a solute from low to high concentration requires an input of energy

proteins are ________ (polar and nonpolar)

Amphipathic

-covalent bonds are sharing of electrons

lipids are a _______. _______ help with delivery of drugs

Bilayer, Liposomes or lipid vesicles

Secondary Transporters-

use one concentration gradient to power the formation of another.

ex of secondary transporters:

1.) symporters

molecules move in SAME direction

ex of secondary transporters:

2.) Antiporters

one molecule in OPPOSITE direction

the ability to cross a membrane is a function of its _______

hydrophobicity

cholesterol concentration ________ fluidity

increases

Na+ - +, sodium potassium pump

uses energy, example of active transport

laterial diffusion

rapid

transverse diffusion

very slow

membrane fluidity directly depends upon ______

low melting point