Integrating Cells Into Tissues

Question 1

How long can packed red cells be stored for?

Answer 1

42 days at 6 degrees

Frozen for 10 years

Question 2

What is there to allow lateral cell attachment?

Answer 2

Desmosomes
Gap junctions
Tight junctions

Question 3

What are tight junctions made of?

Answer 3

Fused plasmalemma

Question 4

What are gap junctions?

Answer 4

Made of connexon

Allow communication

Question 5

What provides cell anchorage on basal membrane?

Answer 5

Hemidesmosomes
Focal adhesions
Integrins

Question 6

Where are hemidesmosomes found?

Answer 6

Tissues subject to abrasion

Question 7

What are focal adhesions made of?

Answer 7

Actin

Question 8

What are FA for?

Answer 8

Cell movement

Question 9

What are the two main functions of integrins?

Answer 9

Attachment of cell to ECM

Signal transduction from ECM to cell

Question 10

Name some features of cultured cells

Answer 10

Contact inhibition

Scenescence

Question 11

Name some types of cell communication

Answer 11

Direct through gap junction 
Autocrine via positive feedback 
Paracrine 
Endocrine 
Synaptic via NT
Neurocrine

Question 12

What defines a prokaryote?

Answer 12

No nucleus and no mito

Question 13

How are cells thought to have developed?

Answer 13

Endosymbiosis

Aerobic bacteria taken into anaerobic eukaryote

Question 14

Name the 4 basic muscle types

Answer 14

Epithelial
Muscle
Nerve
Connective

Question 15

What are epitheliod cells and give an example?

Answer 15

Cells that don’t have a surface

eg leydig cells, islets of langerhans