Chapter 22: Blood Vessels

Question 1

what are the three layers of blood vessels

Answer 1

tunica interna, tunica media, tunica externa

Question 2

what type of tissue is tunica interna

Answer 2

simple squamous epithelial

Question 3

what is the tissue of the tunica interna called

Answer 3

endothelium

Question 4

what is tunica interna’s function

Answer 4

diffuse molecules

Question 5

what type of tissue is the tunica media

Answer 5

smooth muscle tissue and elastic fibers

Question 6

what does tunica media regulate

Answer 6

diameter of the lumen

Question 7

the tunica media’s constriction of diameter causes

Answer 7

increase in blood pressure and blood flow

Question 8

what tissue is the tunica externa make of

Answer 8

connective tissue and collagen fibers

Question 9

what do arteries do

Answer 9

carry blood away from the heart

Question 10

what is the arteries innervated by

Answer 10

sympathetic autonomic nervous system

Question 11

what is the function of arteries

Answer 11

stimulates smooth muscle cells to contract and cause constriction of blood vessel walls

Question 12

what is another name for elastic arteries

Answer 12

conducting arteries

Question 13

what is the function of elastic arteries

Answer 13

propel blood distally

Question 14

what are some examples of elastic arteries

Answer 14

aorta, pulmonary trunk, common carotid artery

Question 15

what is another name for muscular arteries

Answer 15

distributing arteries

Question 16

where are muscular arteries found

Answer 16

extremities

Question 17

what is another name for arterioles

Answer 17

resistance arteries

Question 18

what do arterioles do

Answer 18

regulate blood flow into capallaries

Question 19

what is the arterioles innervated by

Answer 19

the sympathetic nervous system to regulate resistence

Question 20

what is the construction of elastic arteries like

Answer 20

largest lumen diameter, thick media, lots of elastic fibers

Question 21

what is the construction of the muscular arteries like

Answer 21

medium sized, thinner tunica externa, thick tunica internal

Question 22

what is the construction of the arterioles,

Answer 22

small, no turnica externa, thin tunica internal

Question 23

what are metarteriole

Answer 23

terminal end of arteriole and entrance into capillaries

Question 24

what are in metarteriole

Answer 24

precapillary sphincters and thoroughfare channels

Question 25

what do precapillary sphincters do

Answer 25

regulate flow of blood into capillaries

Question 26

what do thoroughfare channels do

Answer 26

run through capillary bed to connect to venule

Question 27

what are anastomosis

Answer 27

joining blood vessels

Question 28

what are the two type of anastomosis

Answer 28

arterial anastomosis and atriovenous anatomosis

Question 29

what is the function of arterial anastomosis

Answer 29

alternate route for blood to reach tissue for collateral circulation

Question 30

what are arterial anastomosis

Answer 30

two or more arteries that supply blod to one capillary bed

Question 31

what is the function of atriovenous anatomosis

Answer 31

direct flow of blood from arteriole to venule

Question 32

what is capillaries

Answer 32

network of branched and interconnecting vesselvessels

Question 33

what is the function of capillaries

Answer 33

exchange of substances and gases like o2 and co2 throughout the tissues

Question 34

what type of tissues make up capillaries

Answer 34

simple squamous epithelial tissue without a tunica media or externa

Question 35

what are the three types of capillaries

Answer 35

continuous, fenestrated, and sinusoidal capillaries

Question 36

what type of tissue is continuous capillaries

Answer 36

complete endothelium

Question 37

what is function of continuous capillaries

Answer 37

lets water and small solutes diffuse

Question 38

what are the properties of fenestrate capillaries

Answer 38

endothelium with small pores for rapid exchange of water and solutes

Question 39

what are some examples of fenestrated capillaries

Answer 39

choroid plexus and endocrine glands

Question 40

what are the properties of sinusoidal capillaries

Answer 40

endothelium have gaps between cellsto allow water, solutes, and proteisn through

Question 41

what are some examples of sinusoidal capillaries

Answer 41

liver and bone marrow

Question 42

what do veins do

Answer 42

carry blood back to the heart

Question 43

what are venules

Answer 43

groups of capillaries that unite, are thin and have no tunica media

Question 44

what are veins

Answer 44

merged venules with a thick tunica externa and thin media

Question 45

what are some examples of veins

Answer 45

varicose veins, hemorrhoids

Question 46

what is the portal system

Answer 46

blood flow from one capillary network to another before flowing through the heart

Question 47

what are examples of ptal systems

Answer 47

hypothalamus to anterior pituitary and hepatic portal system

Question 48

describe blood flow

Answer 48

heart to elastic arteries to muscular arteries to arteries to metarterioles to capillaries to venules to veins to heart