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Matter
anything that takes up space and has mass
element
a substance that cannot be broken down into other substances by chemical reactions
compound
a substance consisting of two or more difference elements combined in a fixed ratio
CHOPN
Carbon, Hydrogen, Oxygen, Phosphorous, Nitrogen
Selective permeability
the ability of membranes to regulate the substances that enter and exit
hydrophilic head orient towards…
the aqueous environments
hydrophobic tails orient…
facing inwards away from the aqueous environments
amphipathic
having both hydrophobic and hydrophilic parts
What does the plasma membrane do?
separates internal cell environment from external environment
What is the name of the model used to describe the structure of a cell membrane?
Fluid Mosaic Model
What does “Fluid” mean in the Fluid Mosaic Model?
the membrane is held together by weak hydrophobic interactions and can therefore move and shift
What does “Mosaic” mean in Fluid Mosaic Model
it’s compromised of many macromolecules, with the surface resembling a mosaic painting
What affects fluidity?
temperature and amount of unsaturated fatty acids (the hydrocarbon tails)
______ helps maintain fluidity at high and low temperatures
Cholesterol
What are the major categories of proteins in the membrane?
Integral proteins and Peripheral proteins
Note 
Flashcard (44)