Cell Ultrastructure Flashcards
What are the functions of the glycocalyx?
adhesion to substrates and neighbouring cells, mobility of cells, communication with other cells and contact inhibition of movement and division
What are the 4 ways of controlling secretion?
nervous, endocrine, neuro-endocrine and negative feedback
What are the functions of the Golgi apparatus?
sorting into different compartments, packaging through condensation, glycosylation and transport of resultant vesicles
Define limit of resolution
The minimum distance at which 2 objects are distinguishable.
As wavelength decreases, resolution…
Improves
What do you treat a specimen with before using a SEM?
Gold or palladium
What are the functions of a plasma membrane?
selective permeability, transport of materials along cell surface, endocytosis, exocytosis, intercellular adhesion, intercellular recognition and signal transduction
What is endosymbiosis theory?
The theory that all kingdoms of life evolved from an ancestral prokaryote.
What is the cytoskeleton made up of?
Microfilaments, Intermediate filaments and Microtubules
What are microfilaments made up?
Actin filaments
What is the function of microfilaments?
To keep the cell shape
What is the function of intermediate filaments?
To form the tough, supporting meshwork in the cytoplasm
What is the function of microtubules?
Movements of structures
