Vessel Overview

Order of layers of vessels from deep to superficial

• Tunica Externa, Tunica Media, Tunica Interna

• Tunica Interna, Tunica Externa,

  Tuhica Media

• Tunica Interna, Tunica Media, Tunica Externa

• Tunica Media, Tunica Interna, Tunica Externa

Capillaries have only this layer

• Tunica Interna

• Tunica Media

• Tunica Externa

• Tunica Intima

Arteries have elastic tissue in which layer?

• Tunica Interna

• Tunica Media

• Tunica Externa

• Tunica Intima

What percentage of capillary beds are shut down at any given time?

• 10%

• 25%

• 50%

• 75%

Which vessel has one way valves?

• arteries

• arterioles

• veins

• capillaries

Amount of blood in Capillaries at a given time

• 5%

• 10%

• 15%

• 65%

Amount of blood in Veins at a given time

• 5%

• 10%

• 15%

• 65%

Amount of blood in Arteries at a given time

• 5%

• 10%

• 15%

• 65%

Which is the correct relationship between Blood Flow(F), Blood Pressure (P) & Resistance (R)?

• R = F x P

• P = R/F

• F = P/R

• F + P = R

Normal Blood Pressure at entrance to capillaries.

• 18mm Hg

• 35mm Hg

• 72mm Hg

• 120mm Hg