Bio unit 2 Flashcards
functions of integral protein
- transport
- ID tag
- attached point for cytoskeleton
- enzyme sequence
- cell to cell junction
- signal transduction`
attachment point for cytoskeleton-integral protein
microtubules-protein connected to proteins that are not integral (peripheral protein) that are pressed up against membrane.
microtubules connected to centrosome
enzymatic sequence-integral protein
metabolic pathway: enzyme connected together, makes a product at the end.
cell to cell junction/connection-integral protein
- nectin-tight function, ax and hook
- desmosome- microtubules inside membrane connects to nectin (stronger junction for pulling)
- gap junction-channel protein
signal transduction-integral protein
have site on ECM that catches extracellular protein-hormones
after getting hormone
part of integral protein inside cell becomes enzyme makes a product that go into nucleus to trigger transcription/production of stuff (make spec protein)
low water potential
low chance of water moving out quickly
high water potential
low solute
to calculate water potential
Y=Ys+Yp
Ys: solute potential to get in the way (-)
Yp: pressure
more pressure
increase in water movement/potential (+)
water movement
high to low
Y=-iCRT
i: sugar-1, salt-2
C: cocen of solute
R: presure on cell by water= .0831
T: kelvin (ºC+273)
phospholipid
hydrophilic=phosphate
hydrophobic=fatty acid, non polar, not aqueous.
amphipathic: both
membrane
phospholipids don’t interact with each other and can b manipulated.
cold envir: loses fluid- unsaturated
-protein don’t stay in place
goals of membrane
- resist solidifying as temp decrease
- resist falling apart as temp increase
