B2.1 syllabus Flashcards
the lipids in the bilayer are
unsaturated so the lipid bilayer is liquid
cholesterol
prevents stiffening at lower temperatures and stablisies at higher temps
basically ajusts membrane fluidity
endocytosis
large susbtances enter cell withoutb crossing membrane
phagocytosis (solid ingested)
pinocytosis (liquids ingested
exocytosis
exit without crossing cell membrane
vesicles fuse witH MEMBRANE and expel their contex
memebtrane transport protein channrld typrd
votage gated channel
ligand gated channel
mechanically gated channel
voltage gated channel
closed when no pd
opens with pd accross membrane
sodium in na k channels can trigger opening due to charge
ligand gated channel
closed in abnsence of specicic channel (ligand)
open when ligand binds
mechanically gated channel
closed whenn no vibrations
opens when vibrations such as sound
na k channels are important for
resting membrane potential which allow nerve impulse transmission and proper cell function
indirect active transport
sodium dependent glucose cotransporters
why are sodium dependent glucose cotransporters important
essential for absorbing glucose in intestines and nephron using na+ gradient
energy supply
examples of glycoproteins
immunogloblins (bind to antigens for immune response, produces by white blood cells)
antibodies
proteome
all the proteins produced by a cell, is variable
genome contains genes
that are not expressed
only polysaccharied with b 1,4 glycosidic bonds is
celluslose
amylose vs amylopectin
coiled
branched
2ndary sructures stabalised by
–NH groups of peptide bonds and –C=O groups of other peptide bonds found in the same chain.
