Flashcards in Tissues 1: Epithelial cells 1 Deck (17)
Which organelle has double membrane
The nucleus, it has an outer and inner membrane called the nuclear envelope
What happens at the nucleolus
Ribosome subunits are produced
What is the nuclear envelope continous with?
Where are ribosome subunits produced
What is the function of ER
Packaging and processing proteins
What are nuclear pores?
The are proteinc complexes that control what enters and leaves the nucleus
What kinds of ER are there, what are there functions?
rER-Rough endoplasmic reticulum: Flattened sheets, continous with nuclear envelope and have ribosomes attached on its outer surface, involved in protein synthesis
sER-Smooth endoplasmic reticulum: Tubular membranes involved in lipid metabolism
What is the golgi apparatus and what does it do?
Stacked, flattened membranes sacs which modify, package & sort macromolecules for secretion or delivery
what are the compartments?
Cis golgi network
Trans golgi network
Cell eating-Internaliation of large particles
Cell drinking-Internalisation of extracellular fluid
Major function=receptor mediated endocytosis
Where ATP is produced via oxidative phosphorylation & TCA cycle
Enzymes contained involved in lipid and oxygen metabolism
What are the 3 types of filament?
Polymers of alpha & beta tubulin
20nm diameter (roughly)
some part in cell shape & act as tracks for organelles around cell
Major components of cilia and flagella
arranged in 9.2 formation in cilia
Part of spindle fibres
What is the name of the point from which Microtubules tend to radiate from
Microtubule organising centre(MTOC)
A group of filamentous proteins forming rope like filaments
10-15nm diameter(in between the other two)
Different cell types=different filalements
Give mechanical strength
Desmosomes: Connected by cytokeratins(IF)
Nuclear Lamins:Stabilise the envelope and are network of IF on internal surface