Cell Junctions 0.0 / 5 ? BiologyCell biologyUniversityNone Created by: SarahCreated on: 03-05-17 09:25 what do hemidesmosomes do? anchor intermediate filaments to the basal lamina 1 of 30 what signals open up/control gap junctions? Calicum ions, PH and signals 2 of 30 what is pemphigus? autoimmune skin blistering disease 3 of 30 what is pemphigus caused by? body attacks desmoglein affects adheren junctions 4 of 30 what are adheren junctions made up of? cadherin (E type) 5 of 30 if adherens are heterophilic what do they depend on? calcium ions 6 of 30 if adherens are homophillic what do they have? a homophillic reaction 7 of 30 where are desmisomes present? in epithelia 8 of 30 what are desmisomes for? joins intermediate filaments in one cell to those in neighbouring cell 9 of 30 what are main functions of junctions? integrity, communication, cytoskeleton role, compartments, protein families, dynamic 10 of 30 what are hemidesmosomes made of? integrins and intermediate filaments 11 of 30 what are adherens junctions also known as? belt desmosomes/adhesion belt 12 of 30 what do adheren junctions do? join an actin bundle in one cell to an actin bundle in a neighbouring cell 13 of 30 how does an adhesion belt/belt desmosome work? contractile mechanism, actin based movement 14 of 30 an example of belt desmosome working? formation of neural tube 15 of 30 what are the roles of tight junctions? forms a barrier (no leak), prevent fluid, ion M flow, paracellular transport 16 of 30 what are other names for tight junctions? zonae occludens or occluding junctions 17 of 30 what is the experiment used for tight junctions? applying electrons to the apical membrane 18 of 30 what is the difference when applying electron dense material to the outside and inside of tight junctions? outside- doesn't come inside, inside- goes no further that tight junction 19 of 30 where are tight junctions found? in the epithelia of the gut 20 of 30 tight junctions separate membrane proteins what proteins on the apical surface? glycolipids cholesterol 21 of 30 tight junctions separate what on the basolateral surface? phosphatidylcholine 22 of 30 how big is the gap in a gap junction? 2-4um 23 of 30 what do gap junctions allow? cell cell communications is like a little hollow tunnel to transport stuff 24 of 30 where are gap junctions found? heart, smooth muscle and neurons 25 of 30 what do gap junctions allow through? ip3, ATP, cAMP, amino acids and ions 26 of 30 what do gap junctions prevent going through? proteins 27 of 30 influx of calcium ions does what to gap junctions? potentially shuts to limit damage to cells 28 of 30 order of formation of gap junctions? connexins/innexins -> connexons --> intracellular channel 29 of 30 are connexons homomeric or hetromeric? can be either 30 of 30
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