Circulatory Hemodynamics + Syst/Pulm Circulation

Question 1

Circulation divides into:

Answer 1

Systemic and Pulmonary

Question 2

Which part of systematic circulation has more blood circulating?

Answer 2

Venous Reservoir

Question 3

The Circulation associated with carrying oxygenated blood from the Left side is the:

Answer 3

System

Question 4

The low pressure system is the:

Answer 4

Pulmonary circulation

Question 5

The resistance vessels are

Answer 5

Arterioles

Question 6

Capillaries are described as _____________ vessels

Answer 6

Exchange

Question 7

Capacitance vessels are the

Answer 7

Venules

Question 8

Between systemic and pulmonary circulation, which one has more blood distributed?

Answer 8

Systemic

Question 9

Describe Ohm’s Law of Circulation

Answer 9

Blood flow occurs when there is a difference in pressure in the 2 ends of the vessel

Question 10

The quantity of blood that passes through a given point in circulation is:

Answer 10

Blood flow

Question 11

What is identical to blood flow?

Answer 11

Cardiac output

Question 12

List 2 factors affecting blood flow

Answer 12

• pressure
• resistance

Question 13

Define BP

Answer 13

Force exerted by the blood against any area of a vessel wall; stored energy

Question 14

What generates BP?

Answer 14

Ventricular contraction, total peripheral resistance and mean circulatory filling pressure

Question 15

The energy used up by friction is converted into?

Answer 15

Heat

Question 16

In what part of the circulation system is there a maximal drop in BP?

Answer 16

Arterioles because of maximum resistance

Question 17

What does functional pressure prevent?

Answer 17

Leakage of substances into surrounding tissues

Question 18

The mean pressure in pulmonary circulation is how much in regards to systemic pressure

Answer 18

1/6

Question 19

Aortic mean arterial pressure is:

Answer 19

100 mmHg

Question 20

What are the 3 types of pressure?

Answer 20

• MAP
• Systolic
• Diastolic

Question 21

The pressure of blood ejected into the aorta is:

Answer 21

Systolic

Question 22

In what units is Blood flow determined?

Answer 22

ml/min or L/min or volume/time

Question 23

Resistance = pressure/ ?

Answer 23

flow

Question 24

The streamlined flow when the interior of the vessel is smooth and equal in diameter is:

Answer 24

Laminar flood

Question 25

Turbulent flow is ?

Answer 25

Interrupted flow when the interior of the vessel is constricted

Question 26

What measures the tendency for turbulent flow?

Answer 26

Reynold's number

Question 27

List the factors affecting Reynold's number

Answer 27

Velocity = v diameter = d density = p viscosity = greek n

Question 28

Where is flow the greatest in a vessel?

Answer 28

In the center of the vessel

Question 29

The 2 methods you can measure blood flow are:

Answer 29

Electromagnetic and US doppler

Question 30

What sounds will be produced when auscultating arterial pressure while measuring it?

Answer 30

Kortotkoff Sounds - blood jetting through occluded vessel

Question 31

When Korotkoff sounds disappear, what does that mean?

Answer 31

Diastolic pressure

Question 32

The average of all pressure measured?

Answer 32

Mean Arterial pressure

Question 33

Total resistance in the parallel circuit is (less/more) than a single blood vessel

Answer 33

Less

Question 34

Total Peripheral Resistance is because of what?

Answer 34

Arrangement of parallel circuits because of branching TPR will be 1/R + 1/R2 + ...

Question 35

What is the systemic circulation TPR?

Answer 35

1 (100mmHg/100ml Sec)

Question 36

If vessels are constricted, TPR (increases or decreases)

Answer 36

increases

Question 37

How much of total pulmonary vascular resistance is the TPR?

Answer 37

1/6

Question 38

What is the formula for arterial pressure?

Answer 38

CO x TPR

Question 39

If CO = 4 L/min and TPR = 3, what would the MAP be?

Answer 39

12 mmHg

Question 40

Pulmonary vascular resistance is calculated by ?

Answer 40

Mean Aortic pressure - Mean Venacaval pressure / CO

Question 41

1 / Resistance = ?

Answer 41

Conductance

Question 42

What is the measure of blood flow through a vessel for a given pressure difference?

Answer 42

Conductance

Question 43

Conductance of a vessel increases in proportion to the fourth power of the ____________ ?

Answer 43

Radius

Question 44

Conductance is directly proportional to ?

Answer 44

Diameter of the vessel

Question 45

Vasoconstriction (Increases/decreases) resistance

Answer 45

Increases

Question 46

What law is used to calculate conductance?

Answer 46

Poiseuille's Law (Q)

Question 47

The % of blood that is cells that can increase the blood viscosity is"

Answer 47

Hematocrit (f)

Question 48

Describe the Fahraeus-Lindqvist effect

Answer 48

Decrease in viscosity in small vessels because cells become aligned in the axis of the vessel

Question 49

What is the name of the formation when a RBC adherence produces blockage of a vessel?

Answer 49

Rouleaux

Question 50

Are arteries or veins more distensible?

Answer 50

Veins

Question 51

The tendency for blood vessels volume to increase as BP increases is:

Answer 51

Vascular compliance (capacitance) - how much force is required to achieve distension

Question 52

Inhibited sympathetic tone will do what to pressure?

Answer 52

Decrease

Question 53

How can circulation accommodate a large amount of blood?

Answer 53

Through delayed compliance (stress relaxation)

Question 54

If not for ______________, blood flow would only happen during systole

Answer 54

Distensibility

Question 55

Elasticity is the ability to ?

Answer 55

Return to original level after distension

Question 56

The difference between systole and distole =

Answer 56

pulse pressure

Question 57

List some factors that increase Pulse pressure

Answer 57

- stroke volume - HR - Arterial compliance - Arterial vasoconstriction

Question 58

Define damping of pulse pressure

Answer 58

Progressive diminishment in pulse pressure Dampening = resistance x compliance

Question 59

List a vein function

Answer 59

- Storage for blood - help regulate CO

Question 60

When blood is lost and arterial pressure decreases, what part of the nervous systems is activated?

Answer 60

Sympathetic Nervous system