Histology - Anatomy of the Cell Flashcards
What is the cytoskeleton?
The internal scaffolding in a cell.
What is the cytoskeleton made out of?
Microfilaments, intermediate filaments and microtubules
What are microtubules made out of?
Alpha and beta tubulin subunits.
What two ATPase proteins do microtubules attach to?
Kinesin and dynein.
What is the perinuclear cistern?
The space between the two sheets of the nuclear envelope
What are the two forms of DNA?
Euchromatin and heterochromatin.
What is euchromatin?
DNA which is actively transcribed.
What is heterochromatin?
DNA that is not transcribed.
Where are ribosomes formed?
In the nucleolus.
What are the two types of Endoplasmic Reticulum?
Smooth ER and rough ER.
What are polysomes?
A cluster of ribosomes on one strand of DNA.
What is the function of the Golgi Apparatus?
Modifying and packaging vesicle packages from the ER.
What is the function of mitochondria having its own DNA?
Ability to synthesise its own lipids and proteins.
What are the 3 different types of intercellular junctions?
Occluding, anchoring and communicating.
What does the occluding junction do?
Also know as tight junctions where there is no diffusion.
