the arteries

Question 1

arteries carry blood…

Answer 1

away from the heart through the lumen

Question 2

arterioles are small arteries that deliver…

Answer 2

blood to capillaries

Question 3

capillaries are microscopic blood vessels located between

Answer 3

arterioles and venules

Question 4

venules are small veins that collect

Answer 4

blood from capillaries

Question 5

veins carry …

Answer 5

blood from organs back to the heart

Question 6

the lumen have 3 layers in their walls

Answer 6

tunica interna, tunica media, tunica externa

Question 7

tunica interna is the intermost coat that contains

Answer 7

a lining of endothelium, basement membrane, and internal elastic layer

Question 8

tunica media is the middle coat and thickest layer that consists of

Answer 8

elastic fibers and circular smooth muscle fibers

Question 9

tunica externa is the outer coat composed of

Answer 9

elastic and collagen fibers

Question 10

increased sympathetic stimulation causes

Answer 10

vasoconstriction

Question 11

vasoconstrictions decreases the diameter of

Answer 11

the lumen

Question 12

decreased sympathetic stimulation causes

Answer 12

vasodilation

Question 13

vasodilation increases the diameter of

Answer 13

lumen

Question 14

blood flows from arterioles to venules through

Answer 14

capillaries

Question 15

capillaries main function is the exchange of

Answer 15

nutrients and oxygen with wastes and CO2 between the blood and tissue cells

Question 16

the walls of capillaries are composed of only

Answer 16

a layer of endothelium and basement membrane

Question 17

the layers in veins are thinner because

Answer 17

they have less muscle and fewer elastic fibers

Question 18

the lumens in veins are…

Answer 18

larger than in arteries

Question 19

veins have valves that prevent the

Answer 19

backward flow of blood

Question 20

64% of an individual’s blood volume is in

Answer 20

veins and venules while at rest(called blood reservoirs)

Question 21

the volume of blood that flows back to the heart through systemic veins is called

Answer 21

venous return

Question 22

factors that affect venous return are

Answer 22

pumping action of the heart
alternating contraction and relaxation of skeletal muscles in legs
respiratory pumping

Question 23

the pressure exerted by blood on the walls of a vessel is called

Answer 23

blood pressure

Question 24

blood pressure is highest in the

Answer 24

aorta

Question 25

blood pressure is lowest in the

Answer 25

venae cavae

Question 26

velocity of blood flow is greatest in the

Answer 26

large arteries

Question 27

blod flows slowest in the

Answer 27

capillaries

Question 28

it takes how long for a drop of blood to travel thru the body at rest

Answer 28

1 minute

Question 29

factors that affect blood pressure

Answer 29

heart rate blood volume size of the lumen blood viscosity blood vessel length stress drugs body position body temp body size diet and exercise smoking

Question 30

blood pressure is measured by a device called a

Answer 30

sphygmomanometer

Question 31

normal blood pressure should be less than

Answer 31

120 over 80 mmHg

Question 32

the top number of blood pressure represents the

Answer 32

systolic pressure

Question 33

the bottom number of blood pressure represents

Answer 33

the diastolic pressure

Question 34

hypertension is

Answer 34

high blood pressure of greater that 140/90

Question 35

the cardiovascular centers helps regulate

Answer 35

hear rate, stroke volume, force of contraction, and blood vessel diameter

Question 36

helps regulate blood pressure

Answer 36

hormones

Question 37

3 main types of sensory receptors

Answer 37

proprioceptors, baroreceptors, chemoreceptors

Question 38

proprioceptors are found in

Answer 38

muscles and joints

Question 39

proprioceptors monitor

Answer 39

body movement and position

Question 40

baroreceptors monitor change in

Answer 40

pressure and stretch in the walls of blood vessels

Question 41

chemoreceptors monitor the concentration of

Answer 41

various chemicals in the blood

Question 42

increase in sympathetic stimulation results in

Answer 42

increase in heart rate and contractility

Question 43

a decrease in sympathetic stimulation results in a

Answer 43

decrease in heart rate and contractility

Question 44

parasympathetic stimulation decreases

Answer 44

heart rate

Question 45

the cardiovascular center sends impulses to smooth muscles by way of

Answer 45

vasomotor nerves (cause vasoconstriction or vasodilation)

Question 46

hepatic portal vein caries blood from

Answer 46

GI organs and spleen into the liver

Question 47

the liver receives blood from the

Answer 47

hepatic artery

Question 48

hepatic artery branches from the

Answer 48

celiac trunk artery

Question 49

blood leaves the liver through the

Answer 49

hepatic vein

Question 50

the lungs of a fetus does not begin to function utnil

Answer 50

birth

Question 51

the exchange of materials between fetal and maternal circulation occurs through the

Answer 51

placenta

Question 52

the placenta forms in the mother's uterus and attaches to the fetus by the

Answer 52

umbilical cord

Question 53

two umbilical arteries carry

Answer 53

deoxygenated blood from the fetus to placenta

Question 54

the umbilical arteries pick up... and give up..

Answer 54

02 and nutrients, and give up CO2 and wastes

Question 55

oxygenated blood returns from the placenta by the

Answer 55

umbilical vein