blood vessels

Question 1

a structure: thick muscular walls, relatively smaller

lumen. func?

Answer 1

withstand h.b.p directly received from heart

Question 2

a structure: elastic walls. func?

Answer 2

allows a walls to stretch & recoil to push blood in spurts –> pulse and unidirectional flow

Question 3

a structure: muscles in a walls. func?

Answer 3

contract & relax –> regulate lumen size & amt of blood

Question 4

a func: withstand h.b.p directly received from heart. structure?

Answer 4

thick muscular walls, relatively smaller

lumen

Question 5

a func: allows a walls to stretch & recoil to push blood in spurts –> pulse and unidirectional flow. structure?

Answer 5

elastic walls

Question 6

a func: contract & relax –> regulate lumen size & amt of blood. structure?

Answer 6

muscles in walls

Question 7

v structure: thin walls, less elastic & muscular tissues. func?

Answer 7

thick walls less necessary as blood further from heart

Question 8

v structure: semi-lunar valves. func?

Answer 8

prevent backflow of blood from _ to _, ensure unidirectional flow

Question 9

v func: prevent backflow of blood from _ to _, ensure unidirectional flow. structure?

Answer 9

semi-lunar valves

Question 10

v func: thick walls less necessary as blood further from heart. structure?

Answer 10

thin walls, less elastic & muscular tissues

Question 11

c structure: 1 cell thick endothelium. func?

Answer 11

rapid exchange of substances btw blood & cells

Question 12

c structure: thin lumen. func?

Answer 12

forces rbcs to move in single file –> decrease rate of blood flow –> more time for exchange of materials

Question 13

c func: forces rbcs to move in single file –> decrease rate of blood flow –> more time for exchange of materials. structure?

Answer 13

thin lumen

Question 14

c func: rapid exchange of substances btw blood & cells. structure?

Answer 14

1 cell thick endothelium