OT

Question 0

in which vessels would velocity of flow be slowest?

Answer 0

inferior vena cava

Question 1

Arterial blood pressure control is independent of local flow and cardiac output?

Answer 1

true

Question 2

blood flow to most tissues or organs is regulated in proportion to

Answer 2

the metabolic demand

Question 3

which vessel regulate blood flow to an organ?

Answer 3

arterioles

Question 4

which change would create the greatsest increase in resistance to flow?

Answer 4

halving the radius of the vessel

Question 5

increasing the velocity of blood flow decreases the viscosity of blood?

Answer 5

true

Question 6

if the CO is stopped, what will happen to the arterial blood pressure?

Answer 6

fall until it is equal to CVP or CCP

Question 7

what effect does fibrinogen have on viscosity of blood?

Answer 7

decrease viscosity

Question 8

A broadband Doppler reading is obtained over the right carotid artery? what is the significance

Answer 8

partial occlusion

Question 9

angiogenesis can be impaired by?

Answer 9

anti-inflammatory drugs

Question 10

which is NOT a result of SNS stimulation?

Answer 10

increase in active skeletal muscle blood flow

IS: increase strenght cardiac contraction, closing pressure, mean circulatory filling pressure

Question 11

in cardiac failure, what happens to CVP?

Answer 11

increase

Question 12

which situation will venous return stop?

Answer 12

if CVP pressure is equal to mean circulatory filling pressure

Question 13

as a tissue becomes more active, what is the primary way local blood flow increase?

Answer 13

release of local vasodilators

Question 14

what receptor mediates the SNS vasoconstrictor response?

Answer 14

alpha

Question 15

how does circulating ACH cause local dilation of vascular smooth muscle in a tissue bed?

Answer 15

binds to epithithelium causing release of NO

Question 16

during ejection of blood, comment of baroreceptor activity?

Answer 16

increase

Question 17

which would be released by a tissue in response to hypoxia and would promote angiognesis?

Answer 17

VEGF, mediated by adenosine

Question 18

which is true if blood flow to a tissue doubles, but AVO2 difference falls by 1/2?

Answer 18

likely due to shunting

Question 19

using indicator dilution to determine cardiac output , as the duration of the curve increases, what is happening to cardiac output?

Answer 19

decrease

Question 20

in the brain, how is excess plasma filtrate returned to vascular system?

Answer 20

arachnoid villi

Question 21

what is hydraulic filtering?

Answer 21

stretch and recoil of the arterial tree during the cardiac cycle

Question 22

if one renal artery was stetonic, which would be expected?

Answer 22

development of hypertension, angiotensin II levels elevated

Question 23

what is the mechanism by which SNS stimulation to the heart cause local vasodilation of coronary vascular smooth muscle?

Answer 23

NPH stimulation of cardiac cells which release adenosine

Question 24

which area of the vasomotor center is tonically active and provides basal stimulation of the SNS

Answer 24

pressor center

Question 25

which is NOT a important lymphatic function?

Answer 25

produce RBCs

DOES: immune function, carried absorbed fats to Gi tract, return plasma filtrate to vascular system

Question 26

in response to rise in extracellular fluid levels, which change would be counterproductive in keeping blood pressure from rising?

Answer 26

decreased ANP release.

Question 27

in the fetus, what is the function of ductus venosus?

Answer 27

allows blood returning from placenta to bypass liver and flows into inferior vena cava

Question 28

in the fetus, the blood that shunts through the ductus arteriosis is returning from what?

Answer 28

Head

Question 29

slow breathing (6breaths/min) has been shown to decrease both systolic and diastolic BP due to?

Answer 29

decrease sympathetic activity

Question 30

during exercise, which endpoint is decreasing?

Answer 30

total peripheral resistance

Question 31

which will NOT increase venous return during exercise?

Answer 31

increased CVP

WILL increase: increase activity of venous pump, depth of ventilation, sympathetic stimulation

Question 32

if your mean circulatory filling pressure is increased, relative to your CVP which is true?

Answer 32

venous return is decreased

Question 33

if your CO is stopped and a shunt was placed connecting the aorta with the vena cava , the arterial pressure will fall until it equals?

Answer 33

mean circulatory filling pressure

Question 34

in a healthy young adult, comment about tissue during diastole.

Answer 34

maintained by recoil of arteries

Question 35

if blood flow to a tissue doubles, and the AVO2 stays constant, comment on increase in flow?

Answer 35

due to shunting

Question 36

what is responsible for most of the filtration that occurs in systemic capillaries?

Answer 36

capillary hydrostatic pressure

Question 37

which effect is NOT attributed to slow breathing?

Answer 37

increase in mean arterial blood pressure

Question 38

cardiac function, as CVP increase what happens to venous return

Answer 38

decrease