Integrating Cells into Tissues Flashcards
In the lateral domain how do cells remained attached to each other?
tight junction, desmosomes, gap junction
What is the basal domain?
bottom section of a cell where it attaches to the basement membrane
Name the ways a cell anchor in the basal domain
hemidesmosomes, focal adhesions
What is the function of a tight junction?
seal between 2 cells
What is the role of a desmosome?
strengthen the junction between 2 cells
What does a gap junction allow cell to do?
connection proteins form channels, allowing communication
Name and explain the function of the extensions in the apical domain
microvilli: increase surface area, stereovilli: epididymis and sensory hair cells in the ear, cilia: motile
Name the protein that attaches the cell cytoskeleton to extracellular matrix
integrins
List the ways cells can communicate
DIRECT: gap junctions, AUTOCRINE: to self, PARACRINE: next to, ENDOCRINE: secreted into blood, SYNAPTIC: electrical signal along nerves neurotransmitter, NEUROCRINE: electrical signal down nerve releasing neurotransmitter to blood
What does senescence mean?
loss of a cell’s power of division and growth due to short telomere length
What is the difference between endo and exocytosis?
endo: into the cell, exo: out of the cell
What is the name given to cell that do not have a surface and give example?
epithelioid: islets of Langerhans, parenchyma of adrenal glands
What is a fibroblast?
synthesise and secret ground substance and fibres procollagen –> collagen (vit C required), involved in wound healing