Integrating Cells into Tissues

Question 1

In the lateral domain how do cells remained attached to each other?

Answer 1

tight junction, desmosomes, gap junction

Question 2

What is the basal domain?

Answer 2

bottom section of a cell where it attaches to the basement membrane

Question 3

Name the ways a cell anchor in the basal domain

Answer 3

hemidesmosomes, focal adhesions

Question 4

What is the function of a tight junction?

Answer 4

seal between 2 cells

Question 5

What is the role of a desmosome?

Answer 5

strengthen the junction between 2 cells

Question 6

What does a gap junction allow cell to do?

Answer 6

connection proteins form channels, allowing communication

Question 7

Name and explain the function of the extensions in the apical domain

Answer 7

microvilli: increase surface area, stereovilli: epididymis and sensory hair cells in the ear, cilia: motile

Question 8

Name the protein that attaches the cell cytoskeleton to extracellular matrix

Answer 8

integrins

Question 9

List the ways cells can communicate

Answer 9

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

Question 10

What does senescence mean?

Answer 10

loss of a cell’s power of division and growth due to short telomere length

Question 11

What is the difference between endo and exocytosis?

Answer 11

endo: into the cell, exo: out of the cell

Question 12

What is the name given to cell that do not have a surface and give example?

Answer 12

epithelioid: islets of Langerhans, parenchyma of adrenal glands

Question 13

What is a fibroblast?

Answer 13

synthesise and secret ground substance and fibres procollagen –> collagen (vit C required), involved in wound healing