Questions Derived From BRS PHYS

Question 1

Left sided cardiac output

Answer 1

Systemic

Question 2

Site of highest resistance in the cardiovascular system

Answer 2

Arterioles

Question 3

Arteriolar resistance is regulated by?

Answer 3

Autonomic nervous system

Question 4

Alpha-adrenergic receptors are found on arterioles of

Answer 4

Skin, splanchnic, and renal circulations

Question 5

Beta-adrenergic receptors are found in the arterioles of

Answer 5

Skeletal muscles

Question 6

Veins have what type of adrenergic receptors

Answer 6

Alpha

Question 7

Stressed volume of blood is found in the

Answer 7

Arteries

Question 8

Unstressed vol of blood is found in the

Answer 8

Veins

Question 9

Mean arterial pressure - right atrial pressure
____________________________________________. =

Total peripheral pressure

Answer 9

Cardiac output

Question 10

Represents atrial depolarization

Does not include atrial repolarization

Answer 10

P wave

Atrial repolarization is buried in the qrs

Question 11

Interval from beginning of p wave to the beginning of q wave

Initial depolarization of the ventricle

Answer 11

PR interval

Question 12

PR interval depends on the conduction velocity through

Answer 12

The atrioventricular node (AV node)

Question 13

If AV nodal conduction decreases (I.e; heart block) PR interval

Answer 13

Increass

Question 14

PR interval is decreased by stimulation of the ___ Nervous system

Answer 14

Sympathetic

Question 15

PR interval is increased by stimulation of the ____ nervous system

Answer 15

Parasympathetic

Question 16

Represents the depolarization of the ventricles

Answer 16

QRS complex

Question 17

Represents the entire period of the depolarization and repolarization of the ventricles

Answer 17

QT interval

Question 18

Isoelectric

Represents the period when the ventricles are depolarized

Answer 18

ST segment

Question 19

Represents ventricular repolarization

Answer 19

T wave

Question 20

Upstroke in action potential.
Caused by transient increase in Na conductance
Depolarizs membrane

Answer 20

Phase 0

Question 21

SA Node > _____ > His - purkinje

Conduction speed

Answer 21

AV node

Question 22

Ionic basis for phase 0 in SA node

Answer 22

Calcium

In the ventricles, atria, and purkinje phase 0 zero is from Na

Question 23

The funny current is caused by an increase in Na conductance which results in an inward Na current. It is turned on by ?

Answer 23

Repolarization of the action potential during the preceeding ap.

Question 24

_____ effects produce changes in conduction velocity, primarily at the AV node

Answer 24

Dromotropic effect

Question 25

Produce changes in heart rate

Answer 25

Chronotropic effect

Question 26

Positive chronotropic effect:

Answer 26

Increases heart rate by increasing the firing rate of the SA node

Question 27

Negative chronotropic effect does what

Answer 27

Decreases HR by decreasing firing rate of SA node

Question 28

The intrinsic ability of cardiac muscle to develop force at a given muscle lenghter

Answer 28

Contractibility (inotropy) Is related to the intracellular calcium concentration

Question 29

Factors that increase contractility

Answer 29

Increased heart rate Sympathetic stimulation via beta-1 receptors Cardiac glycosides (digitalis)

Question 30

Factors that decrease contractility

Answer 30

Parasympathetic stimulation (acetylcholine) via muscarinic receptors

Question 31

Increases in end-diastolic volume (volume in right atria) cause an increase in ventricular fiber length, which produces an increase in developed tension

Answer 31

Frank-starling relationship

Question 32

Increase in aortic pressure Decreased stroke volume Decreased width of pressure volume loop Due to

Answer 32

Increased afterload

Question 33

When an artery is added in parallel, the total resistance ________

Answer 33

Decreases

Question 34

Compliance is much greater for _____ than for ______

Answer 34

Veins Arteries

Question 35

Mean systemic pressure: is ________ by an increase in blood volume or by a decrease in venous capacitance

Answer 35

Increased

Question 36

A mean systemic pressure is ______ by a decrease in blood volume or by an increase in venous capacitance

Answer 36

Increase

Question 37

The slope of the venous return curve (V return/ atrial pressure) is determined by?

Answer 37

Resistance of the arterioles

Question 38

A clockwise rotation of the venous return curve indicates a

Answer 38

Decrease in total peripheral resistance

Question 39

A counterclockwise rotation of the venous return curve indicates

Answer 39

An increase in the total peripheral resistance

Question 40

______ occurs when cardiac output equals venous return

Answer 40

Equilibrium

Question 41

Increasing total peripheral resistance causes a ______ in cardiac output and a ________ in venous return

Answer 41

Decrease Decrease

Question 42

Decreasing TPR causes _______ in both cardiac output and venous return

Answer 42

Increases

Question 43

What is pulse pressure?

Answer 43

Systolic pressure - diastolic pressure