Anatomy Lec Ch22

Question 1

what are the 2 groups of blood vessels

Answer 1

pulmonary circuit and the systemic circuit

Question 2

the pulmonary circuit starts and ends where

Answer 2

pulmonary valve, entrance of left atrium

Question 3

pulmonary arteries that branch from the pulmonary trunk carry blood to the lungs for what

Answer 3

gas exchange

Question 4

the systematic circuit starts and ends where

Answer 4

aortic valve, entrance to the right atrium

Question 5

what is the purpose of the systemic circuit

Answer 5

distribute blood to organs for nutrient, gas, and waste exchange

Question 6

name the three walls of arteries and veins

Answer 6

inner intima, media, outer adventitia

Question 7

what is included in the intima

Answer 7

endothelial lining of the vessel and an underlying layer of connective tissue containing elastic fibers

Question 8

in arteries the outer margin of the intima contains a thick layer of elastic fibers called

Answer 8

internal elastic membrane

Question 9

what does the media contain

Answer 9

concentric sheets of smooth muscle tissue in a framework of loose connective tissue

Question 10

vasoconstriction

Answer 10

constriction of smooth muscles of blood vessel

Question 11

vasodialation

Answer 11

relaxation of smooth muscles of blood vessels

Question 12

vasoconstriction occurs from

Answer 12

sympathetic activation

Question 13

vasodialation occurs from

Answer 13

local stimuli or sympathetic division of ANS

Question 14

what binds the media to the intima and adventitia

Answer 14

collagen fibers

Question 15

arteries have a thin band of elastic fibers located between the media and adventitia called

Answer 15

external elastic membrane

Question 16

the adventia contains

Answer 16

connective sheath around vessel and is made of collagen fibers with scattered elastic fibers

Question 17

vessels are too thick making it hard for

Answer 17

diffusion

Question 18

what is used in place for diffusion of the large thick vessels

Answer 18

contain small arteries and veins that supply large vessels

Question 19

arteries walls are what compared to veins

Answer 19

thicker

Question 20

the artery contains more what in its media than veins

Answer 20

smooth muscle and elastic fibers

Question 21

what is the purpose of elastic arteries

Answer 21

transport large volumes of blood away from the heart

Question 22

due to high amount of elastic fabers in elastic arteries, they are able to

Answer 22

handle the pressures of the cardiac cycle

Question 23

purpose of muscular arteries

Answer 23

transport blood to the bodys skeletal muscle and internal organs

Question 24

muscular arteries have

Answer 24

thicker media wall and higher percentage of smooth muscle cells

Question 25

arterioles have

Answer 25

scattered smooth muscle cells

Question 26

function of arterioles

Answer 26

control blood flow between arteries and capillaries

Question 27

capillaries allow

Answer 27

exchange between blood and the surrounding interstitial fluids

Question 28

what is in the lining of the capillaries

Answer 28

endothelial tube enclosed within a delicate basal lamina