Capillary Histo--Downing Flashcards Preview

CRRAB--Wk 2 > Capillary Histo--Downing > Flashcards

Flashcards in Capillary Histo--Downing Deck (15)
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1
Q

Capillary diameter

A

8-10 microns

2
Q

Capillary cells are joined together with what type of tissue

A

fascia occludentes

3
Q

Functions of pericytes

A

differentiate into endothelial cells or smooth muscle cells

depending on need

may be contractile

run circumferentially

4
Q

Continuous capillaires

A

no interruptions in walls

muscle, nervous, CT

cells joined by fasciae occludentes

5
Q

Fenestrated capillaries

A

pores in capillary walls

covered by thin diaphragm

ppores occur in clusters

6
Q

Where are fenestrated capillaries found

A

endocrine glands, pancreas, intestines

7
Q

Sinusoidal cappillaries

A

large diameter

many fenestrase without diaphragms

8
Q

Sinusoidal capillary location

A

BM, liver, spleen, lymphoid, some endocrine glands

9
Q

Arteriovenous anastomoses

A

direct connnection between arterial and venous side without capillary bed

10
Q

AV anastomoses

3 segments

A

arterial segment

intermediate segment

venous segment

11
Q

Intermediate segment of

AV anastomoses

specialness

A

richly innervated with adronergic and cholinergic nerve fibers

12
Q

Where does leukocyte adhesion and diapedesis occur?

A

post-capillary venule

13
Q

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

A

selectins

14
Q

Integrin function

A

allow leukocytes to bind tighter

15
Q

Angiotensin Converting Enzymes

synthesized in

A

endothelium of capillaries