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
cholesterol
allow fluidity w/o too much fluidity
no charge items
no channel protein
charged item
use channel protein
sugar
fa diff
amino acid
fa dif
nucleotides
fa diff
steroids
fa diff
O2
diff
NH3
fa diff
CO2
diff
hormones
exocytosis
channel protein
has specificity
neuron
sodium outside. pumps-active transport pulls it outside
ID tag
glycoprotein-polysaccharid- blood type; every has different sugar sequence
