Chapter 21 Blood Vessels Part 2

Question 1

measure of force blood exerts against BV walls via ausculataton

Answer 1

BP

Question 2

what is used as instrument to measure BP in mmHg, Measure via Auscultation

Answer 2

mercury manometer

Question 3

bp cuff

Answer 3

sphygmomanometer

Question 4

where does the sthescope go during BP

Answer 4

over brachial artery

Question 5

you inflate BP cuff until

Answer 5

brachial artery is compressed

Question 6

you lower the cuff until below

Answer 6

systolic pressure - tuberlent and vibrates in blood and sounds heard through sthetoscope

Question 7

what are these sounds called during BP

Answer 7

korotkoff sounds

Question 8

1st sound is

Answer 8

systolic

Question 9

when sound disappears it is

Answer 9

diastolic

Question 10

Tendency for Blood vessel volume to increase concurrent with
BP increases

Answer 10

compliance

Question 11

if vessel= greater comliance -

Answer 11

stretches more easily

Question 12

vessels with large compliance have large increase in volume when

Answer 12

pressure increases a small amount

Question 13

venous compliance is about

Answer 13

24x greater than arterial due to thinness of walls

Question 14

veins are storage reservoirs for

Answer 14

blood

Question 15

veins hold large amound of volume which is

Answer 15

64% of blood volume

Question 16

Pressure wave as blood ejected from LV into Aorta  travels quickly along the
arteries, 15 x greater in Aorta

Answer 16

pulse

Question 17

pulse determines

Answer 17

HR, if in rhythm

Question 18

common carotid artery, superficial temporal artery, facial

Answer 18

H&N

Question 19

axillary artery, brachial, radial

Answer 19

arm

Question 20

femoral artery, popiteal, posterior tibial, dorslis pedis

Answer 20

leg

Question 21

pulse is generated by

Answer 21

pulse pressure

Question 22

pulse pressure is influenced by 2 factors which are

Answer 22

stroke volume and vascular compliance

Question 23

pulse pressuer has a inverse relationship w

Answer 23

vascular compliance

Question 24

as compliance increases what decreases

Answer 24

pulse pressure decreases

Question 25

arterial BP depends on

Answer 25

how much the elastic arteries can stretch and volume of blood forced into elastic arteries at any time

Question 26

not constant arterial bp=

Answer 26

pulsatile

Question 27

BP drop to ~35mmHg at beginning of Capillaries & 17mmHg at ends of Capillary Beds Low pressure needed as fragile & risk of rupture

Answer 27

capillary BP

Question 28

steady pressure with little change. Pressure in veins ~15mmHg, low due to Resistance (Too low for adequate venous return)

Answer 28

venous bp

Question 29

3 functional adaptations

Answer 29

muscular pump respiratory pump sympathetic venoconstriction

Question 30

increase in venous return causes increase in what which causes increase in what

Answer 30

increase in SV and increase in CO

Question 31

pressure in vessels are affected by

Answer 31

gravity

Question 32

when u stand there is an increase

Answer 32

pressure in vessels- edema when stand for prolonged period of time

Question 33

If there is NO skeletal muscle movement, pressure at the venous end of the capillaries increase or decrease

Answer 33

increases up to 20% of total blood volume passing through capillary walls into interstitial spaces of lower limbs when standing still

Question 34

As change position Lying down to Stand

Answer 34

BP in lower limb veins increases

Question 35

Increased BP causes Compliant veins to

Answer 35

expand

Question 36

as veins expand and fill with blood

Answer 36

venous return decreases because there is less blood returning to the heart

Question 37

as venous return decreases

Answer 37

CO and BP decreases

Question 38

if neg feedback not kick in and compensate, delivery of blood to brain is

Answer 38

inadequate to maintain homeostasis and dizzy