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Intro to Biology Notes

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This is a whole semester worth of notes, in here you will get a full understanding of the cells and how everything works hand in hand. You look at proteins, tour of the cell, etc. My notes helped a friend go from a B to a F and I was told I should sell, so here they are !

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  • September 16, 2024
  • 1
  • 2023/2024
  • Class notes
  • Professor ksenzencko
  • All classes

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The Fluidity of Membrane

• Most lips and some proteins drift laterally but
rarely flip-flop

&




-
Influenced by Temperature
• as temperatures cool, • Membrane fluidity is also influenced by
membranes switch from a the components of the membrane
FLUID to a SOLID


“ Fluidity buffer” for the membrane, Membrane Proteins
resisting changes in membrane fluidity as and Their Functions
temperature changes




-
-Two major types of membrane
proteins: Intergal & Peripheral

Integral proteins: Permanently embedded in
-Aquaporins: Specialized channel proteins the plasma membrane
that facility water passage through the Peripheral Proteins: Not embedded in
membrane the lipid bilayer
-Some transport proteins called carrier
proteins bind to molecules and change shape to
shuttle them across the membrane




Isotonic - equal inside + out

Hypertonic - higher concentration solutes ( water leaves cell and will sink )

Hypotonic - less concentration solutes ( cell will burst - Osmolarity )

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