Section 2.3 Lecture

Question 1

Do you need to memorize every artery and vein for this class?

Answer 1

No — only the major ones.

Question 2

Which blood vessels bring blood to the heart?

Answer 2

Veins.

Question 3

Which blood vessels carry blood away from the heart?

Answer 3

Arteries.

Question 4

Where does gas exchange actually occur?

Answer 4

Capillaries.

Question 5

Why does exchange not occur well in arteries?

Answer 5

Blood flows too fast.

Question 6

What is laminar flow?

Answer 6

Fast, layered blood flow.

Question 7

Why must blood slow down for oxygen delivery?

Answer 7

To allow diffusion.

Question 8

Which vessels are small enough for only one cell to pass through?

Answer 8

Capillaries.

Question 9

Why are capillaries ideal for exchange?

Answer 9

Slow flow and thin walls.

Question 10

What structural feature of capillaries allows substances to pass?

Answer 10

Tight junctions.

Question 11

What is microcirculation?

Answer 11

Flow through the smallest vessels.

Question 12

What are vasa nervorum?

Answer 12

Vessels that supply nerves.

Question 13

What do vasa nervorum provide?

Answer 13

Oxygen and nutrients.

Question 14

What are vasa vasorum?

Answer 14

Vessels that supply large vessels.

Question 15

Why do large vessels need vasa vasorum?

Answer 15

Blood flows too fast inside them.

Question 16

What part of circulation is damaged in diabetes?

Answer 16

Microcirculation.

Question 17

Which vessels are affected in diabetic neuropathy?

Answer 17

Vasa nervorum.

Question 18

What happens to nerves when vasa nervorum are damaged?

Answer 18

Nerve death.

Question 19

Why can diabetic neuropathy lead to amputation?

Answer 19

Loss of sensation.

Question 20

What causes diabetic retinopathy?

Answer 20

Damaged vasa nervorum.

Question 21

What causes diabetic kidney disease?

Answer 21

Damaged microcirculation.

Question 22

What causes increased heart attack risk in diabetes?

Answer 22

Damaged vasa vasorum.

Question 23

What causes increased stroke risk in diabetes?

Answer 23

Damaged cerebral microcirculation.

Question 24

Which major artery should you know?

Answer 24

Aorta.

Question 25

Which major vein should you know?

Answer 25

Vena cava.

Question 26

Why should providers understand microcirculation?

Answer 26

To prevent diabetic complications.