Heart

Question 1

Norma, heart sounds are caused by:

Answer 1

Closure of the heart valves

Question 2

Which events below do not occur when semilunar valves are open:

Answer 2

Ventricles are in diastole

Question 3

Hemorrage with a large loss of blood causes:

Answer 3

Lowering of blood pressure due to change in cardiac output

Question 4

Left ventricular wall of the heart is thicker than the right wall in order to:

Answer 4

Pump blood with greater pressure

Question 5

Damage to the _____ is referred to as heart block.

Answer 5

AV node

Question 6

The P wave of a normal electrocardiogram indicated:

Answer 6

atrial depolarization

Question 7

Blood within the pulmonary veins returns to the:

Answer 7

left artium

Question 8

Small muscle masses attached to the chordae tendinae are the:

Answer 8

papillary muscles

Question 9

Term for pain associated with deficient blood delivery to the heart caused by transient spasm of coronary arteries is ___________.

Answer 9

angina pectoris

Question 10

Term for pain associated with deficient blood delivery to the heart caused by transient spasm of coronary arteries is ___________.

Answer 10

angina pectoris

Question 11

To auscultate the aortic semilunar valve, you would place your stethoscope in the ___________.

Answer 11

second intercostal space to the right of the sternum

Question 12

The source of blood carried to capillaries in the myocardium would be the _________.

Answer 12

coronary arteries

Question 13

The left ventricle of the heart is thicker than the right ventricle. This reveals that it ___________.

Answer 13

pumps blood against a greater resistance

Question 14

The left ventricle of the heart is thicker than the right ventricle. This reveals that it ___________.

Answer 14

pumps blood against a greater resistance

Question 15

Which does not influence heart rate?

1. skin color
2. age
3. gender
4. body temp

Answer 15

skin color

Question 16

Which is the following is not an age related change affecting the heart?

Answer 16

Thinning of the valve flaps

Question 17

If cardiac muscle is deprived of its normal blood supply, damage would primarily result from __________.

Answer 17

decreased delivery of oxygen

Question 18

What would happen if the length of refractory period was the same as skeletal muscle cells?

Answer 18

tetanic contractions might occur, which would stop the heart’s pumping action

Question 19

What would happen if the length of refractory period was the same as skeletal muscle cells?

Answer 19

tetanic contractions might occur, which would stop the heart’s pumping action

Question 20

Norepi acts on the heart by _________.

Answer 20

causing a threshold to be reached more quickly

Question 21

Norepi acts on the heart by _________.

Answer 21

causing a threshold to be reached more quickly

Question 22

What would happen if vagal nerves to the heart were cut?

Answer 22

heart rate would increase 25 beats per minute

Question 23

What would happen if vagal nerves to the heart were cut?

Answer 23

heart rate would increase 25 beats per minute

Question 24

Foramen ovale connects what?

Answer 24

two atria in the fetal heart

Question 25

Which vessel receives blood during right ventricular systole?

Answer 25

aorta and pulmonary trunk

Question 26

AV node, Bundle of His and and SA node are all part of the ___________ system of the heart.

Answer 26

conduction

Question 27

AV node, Bundle of His and and SA node are all part of the ___________ system of the heart.

Answer 27

conduction

Question 28

Which vessel of the HEART RECIEVES BLOOD during right ventricle systole?

Answer 28

Pulmonary Trunk

Question 29

The tricuspid valve is closed when the...

Answer 29

Ventricle is in systole

Question 30

When viewing a dissected heart, discern the right and left ventricles by:

Answer 30

noticing the thickness of the ventricle wall

Question 31

The AV valves are supported by chordae tendineae so that _____________ of the blood does not occur during ventricular _________.

Answer 31

regurgitation; contraction

Question 32

The entire heart contracts as a unit or it does not contract at all, what is this a function of?

Answer 32

Myocardial cells

Question 33

The myocardium layer, which contracts describes what?

Answer 33

The structure of the heart wall

Question 34

Compared to skeletal muscle, cardiac muscle has a gap junctions that allow it to?

Answer 34

Act as a functional syncytium

Question 35

Compared to skeletal muscle, cardiac muscle has a gap junctions that allow it to?

Answer 35

Act as a functional syncytium

Question 36

Blood flows passively through the artia and the open AV valves into the ventricles during the period of ___________.

Answer 36

ventricular filling

Question 37

The second heart sound is heard during which phase of the cardiac cycle?

Answer 37

isovolumetric relaxation

Question 38

The _________ is the most hazardous time of the day for heart attacks.

Answer 38

morning

Question 39

If we artificially made the pacemaker more permeable to sodium, what would happen.

Answer 39

threshold is reached more quickly and heart rate would increase

Question 40

Cardiac Out-put: A slow heart rate _________ end dialostic volume, stroke volume, and force of _________.

Answer 40

Increases; contraction

Question 41

Cardiac Out-put: A slow heart rate _________ end dialostic volume, stroke volume, and force of _________.

Answer 41

Increases; contraction

Question 42

Some calcium enters the cell from the extracellular space and triggers calcium to release from intracellular space, what is this caused by?

Answer 42

Contraction of heart muscles

Question 43

The short period during ventricular systole when ventricles are completely closed chambers is called?

Answer 43

Isovolumetric contraction

Question 44

The short period during ventricular systole when ventricles are completely closed chambers is called?

Answer 44

Isovolumetric contraction

Question 45

Commotio cordis is heart failure due to what?

Answer 45

mild blow to the chest during vulnerable interval when heart is repolarizing