chapter 21

Question 1

Blood vessels are made of how many layers

Answer 1

3

Question 2

The inner layer of a blood vessel is called

Answer 2

tunica interna

Question 3

The middle layer of a vessel is called

Answer 3

tunica media

Question 4

the outer layer of a blood vessel is called

Answer 4

tunica externa

Question 5

Arteies do what

Answer 5

Carry blood from the heart to tissues

Question 6

arterioles are what

Answer 6

SMALL ARTERIES THAT CONNECT TO CAPILARIES

Question 7

Capillaries are what

Answer 7

the site of substance exchange between blood and the body tissues

Question 8

Venules do what

Answer 8

Connect cappilaries to larger veins

Question 9

Veins do what

Answer 9

Convey blood from the tissues back to the heart

Question 10

Vaso Vasorum is

Answer 10

Small blood vessels that supply blood to the cells of the walls of the arteries and veins

Question 11

Venus sinus are

Answer 11

veins with very thin walls with no smooth muscle to alter there diameters

Question 12

Anastomosis

Answer 12

the union of two or more arteries supplying the same body region

Question 13

collateral circulation

Answer 13

alternates routes for the blood to reach particular organs or tissues through anastomosis

Question 14

capillary exchange

Answer 14

the movement of substances between blood and interstitial fluid

Question 15

continuous capillary exchange

Answer 15

constant passage of substances

Question 16

fenestrated

Answer 16

an intercellular cleft that allows plasma proteins and red blood cells to pass through capillary walls

Question 17

sinusoids

Answer 17

intercellular clefts that are so large that they allow even proteins and blood cells to pass through there walls

Question 18

diffusion

Answer 18

when substances difuse down a concentration gradient and pass freely across the membrane

Question 19

transcytosis

Answer 19

passage of material across endothelium in tiny vesicles

Question 20

bulk flow

Answer 20

movement of large amounts of fluid and disolved or suspended material across capillary membranes into interstitial fluids

Question 21

hemodynamics

Answer 21

bloodflow

Question 22

blood pressure is

Answer 22

the pressure of the blood flow

Question 23

systolic

Answer 23

venticular contraction

120

Question 24

diastolic

Answer 24

ventricular relaxation

80

Question 25

blood flow resistence can be due to

Answer 25

size of the vessel

thickness

length of vessel

Question 26

cardiovascular centers location and function

Answer 26

in the medulla oblongata

helps regulate heart and stroke volume and regulates the blood vessel diameter

Question 27

input from cortex comes from what receptors

Answer 27

higher brain centers

prprioceptors

baroreceptors

chemoreceptors

Question 28

propioceptors

Answer 28

input during physical activity

Question 29

baroreceptors

Answer 29

in carotid artery and aorta

monitor changes in pressure within blood vessels

Question 30

chemoreceptors

Answer 30

monitor concentration of chemicals in the blood

Question 31

higher brain centers and function

Answer 31

cerebral cortex

limbic system

hypothalamus

anticipation of competition and increase in body temperature

Question 32

heart parasympethetic

Answer 32

vagus nerve

decrease heart rate

Question 33

heart sympethetic

Answer 33

cardiac accelorater

causes increase contractility and rate

Question 34

blood vessels sympethetic vasomotor nerves

Answer 34

continuous stimulation to arterioles in skin and abdominal viscera producing vaso constriction

increased stimulation produces constriction and increased BP

Question 35

normal pulse

Answer 35

70-80

Question 36

normal bp

Answer 36

120/80