Vascular Physiology

Question 0

What is the aortic pressure in the systemic circulation?

Answer 0

120 mmHg

Question 1

Blood vessels are classified according to size, name the 6 classifications of blood vessels.

Answer 1

• Aorta and Pulmonary artery
• Arteries
• Arterioles
• Capillaries
• Venules
• Veins

Question 2

What is the pressure gradient in the systemic circulation?

Answer 2

• 80 mmHg when heart relaxed

- 120 mmHg when heart contracts

Question 3

What is the gradient of blood pressure in the pulmonary circulation?

Answer 3

25 mmHg - 10 mmHg

Question 4

What is the blood pressure in veins?

Answer 4

Virtually zero

Question 5

What are the 3 layers found in blood vessel walls?

Answer 5

• Tunica intima
• Tunica media
• Tunica adventitia

Question 6

Which type of blood vessel is different in that it does not have 3 layers in the vessel walls?

Answer 6

• Cappilaries

Question 7

What is the innermost layer in blood vessels?

Answer 7

Tunica intima

Question 8

What is the Tunica intima composed of?

Answer 8

Endothelial cells sitting on a basal lamina

Question 9

What is the middle layer in blood vessels called?

Answer 9

Tunica media

Question 10

What does the Tunica media contain?

Answer 10

Smooth muscle cells - control blood vessel diameter
Elastin
Collagen

Question 11

What is the outmost layer of blood vessels called ?

Answer 11

Tunica adventitia

Question 12

What does the Tunica adventitia contain?

Answer 12

Fibrous connective tissue