cardio 2

Question 1

cerebral blood supply %

Answer 1

15%

Question 2

coronary blood supply%

Answer 2

5%

Question 3

renal blood supply

Answer 3

25%

Question 4

gastrointestinal blood supply

Answer 4

25%

Question 5

skeletal muscle blood

Answer 5

25%

Question 6

Skin blood %

Answer 6

5%

Question 7

what artery does not deliver oxygenated blood

Answer 7

pulmonary artery

Question 8

what are the characteristics of arteries

Answer 8

• thick walled (especially aorta)

- under highest pressure

Question 9

what is arteriolar resistence effected by

Answer 9

• SNS activity
• circulating hormones (angiotensin II, vessopressin)
• local vasoactive substances

Question 10

Arterioles

Answer 10

• extensive development of smooth muscle

- site of most resistance and largest pressure drop

Question 11

capillaries

Answer 11

• exchange vessels form leading to function
• greatest cross section area
• no smooth muscle activity

Question 12

what is the persusion of capillaries determined by

Answer 12

the activity of arterioles

Question 13

physical cherecteristics of venules and veins

Answer 13

• thin walled
• less elastic and muscle tissue
• contain venous valves to prevent backflow (part of endothelial layer)

Question 14

how much of the blood can veins store

Answer 14

up to 2/3rds of the total blood volume

Question 15

true or false: vein vasodialate and vasocontrict

Answer 15

False: arteries. Veins venodialate and venoconstrict

Question 16

3 layers of the typical artery

Answer 16

• tunica intima
• tunica media
• tunica externa

Question 17

what does the tunica intima consist of

Answer 17

endothelial cells
connective tissue
internal elastic membrane

Question 18

anatomy of the typical vein

Answer 18

thinner tunica
media
presence of venous valves within endothelium