Capillary Histo--Downing

Question 1

Capillary diameter

Answer 1

8-10 microns

Question 2

Capillary cells are joined together with what type of tissue

Answer 2

fascia occludentes

Question 3

Functions of pericytes

Answer 3

differentiate into endothelial cells or smooth muscle cells

depending on need

may be contractile

run circumferentially

Question 4

Continuous capillaires

Answer 4

no interruptions in walls

muscle, nervous, CT

cells joined by fasciae occludentes

Question 5

Fenestrated capillaries

Answer 5

pores in capillary walls

covered by thin diaphragm

ppores occur in clusters

Question 6

Where are fenestrated capillaries found

Answer 6

endocrine glands, pancreas, intestines

Question 7

Sinusoidal cappillaries

Answer 7

large diameter

many fenestrase without diaphragms

Question 8

Sinusoidal capillary location

Answer 8

BM, liver, spleen, lymphoid, some endocrine glands

Question 9

Arteriovenous anastomoses

Answer 9

direct connnection between arterial and venous side without capillary bed

Question 10

AV anastomoses

3 segments

Answer 10

arterial segment

intermediate segment

venous segment

Question 11

Intermediate segment of

AV anastomoses

specialness

Answer 11

richly innervated with adronergic and cholinergic nerve fibers

Question 12

Where does leukocyte adhesion and diapedesis occur?

Answer 12

post-capillary venule

Question 13

What molecule binds WBC on endothelium and takes them out of cicrulation?

Answer 13

selectins

Question 14

Integrin function

Answer 14

allow leukocytes to bind tighter

Question 15

Angiotensin Converting Enzymes

synthesized in

Answer 15

endothelium of capillaries