Chapter 6
Supplemental Instruction
Iowa State University
Leader:
Course:
Instructor:
Date:
Nur
Bio 212
Kukday
Jan 26, 2015
Ch. 6 Lipids and Cell Membranes
Define:
Lipids
Unsaturated FA
Glycerol
Selective Permeability
Active Transport
Osmosis
Hydrocarbons
Fats
Oils
Lipid Bilayer
Diffusion
Isotonic
Fatty Acids (FA)
Steroids
Ester Linkage
Membrane Fluidity
Concentration Gradient
Hypertonic
Assign the below lipids as polar or non-polar.
LIPIDS
MEMBRANE
PHOSPHOLIPIDS
CHOLESTEROL
Saturated FA
Phospholipids
Plasma Membrane
Passive Transport
Equilibrium
Hypotonic
NON-MEMBRANE
WAXES
STEROIDS
FATS
What is the relationship between cholesterol and steroids?
Draw a triacylglycerol (or named triglyceride) and show where the ester linkage is formed.
The more saturated the phospholipid is, the more/less fluid is the membrane. Why?
The longer the hydrocarbon chain is, the more/less fluid is the membrane. Why?
Adding cholesterol to the membrane would increase/decrease membrane permeability. Why?
As temperature increases, the fluidity of the membrane increases/decreases. Why?
What are the two kinds of facilitated diffusion? What passes through the membrane with
simple diffusion? What about facilitated diffusion?
DIFFUSION
SIMPLE
FACILITATED
Critical Thinking:
What do you think happens to the cholesterol content of lipid bilayers of fish that move from
cool to warm temperatures?