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BIO202 > Heart > Flashcards

Heart Flashcards

1
Q

Norma, heart sounds are caused by:

A

Closure of the heart valves

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2
Q

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

A

Ventricles are in diastole

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3
Q

Hemorrage with a large loss of blood causes:

A

Lowering of blood pressure due to change in cardiac output

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4
Q

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

A

Pump blood with greater pressure

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5
Q

Damage to the _____ is referred to as heart block.

A

AV node

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6
Q

The P wave of a normal electrocardiogram indicated:

A

atrial depolarization

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7
Q

Blood within the pulmonary veins returns to the:

A

left artium

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8
Q

Small muscle masses attached to the chordae tendinae are the:

A

papillary muscles

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9
Q

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

A

angina pectoris

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10
Q

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

A

angina pectoris

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11
Q

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

A

second intercostal space to the right of the sternum

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12
Q

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

A

coronary arteries

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13
Q

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

A

pumps blood against a greater resistance

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14
Q

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

A

pumps blood against a greater resistance

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15
Q

Which does not influence heart rate?

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

skin color

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16
Q

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

A

Thinning of the valve flaps

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17
Q

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

A

decreased delivery of oxygen

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18
Q

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

A

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

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19
Q

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

A

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

20
Q

Norepi acts on the heart by _________.

A

causing a threshold to be reached more quickly

21
Q

Norepi acts on the heart by _________.

A

causing a threshold to be reached more quickly

22
Q

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

A

heart rate would increase 25 beats per minute

23
Q

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

A

heart rate would increase 25 beats per minute

24
Q

Foramen ovale connects what?

A

two atria in the fetal heart

25
Q

Which vessel receives blood during right ventricular systole?

A

aorta and pulmonary trunk

26
Q

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

A

conduction

27
Q

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

A

conduction

28
Q

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

A

Pulmonary Trunk

29
Q

The tricuspid valve is closed when the…

A

Ventricle is in systole

30
Q

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

A

noticing the thickness of the ventricle wall

31
Q

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

A

regurgitation; contraction

32
Q

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

A

Myocardial cells

33
Q

The myocardium layer, which contracts describes what?

A

The structure of the heart wall

34
Q

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

A

Act as a functional syncytium

35
Q

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

A

Act as a functional syncytium

36
Q

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

A

ventricular filling

37
Q

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

A

isovolumetric relaxation

38
Q

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

A

morning

39
Q

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

A

threshold is reached more quickly and heart rate would increase

40
Q

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

A

Increases; contraction

41
Q

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

A

Increases; contraction

42
Q

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

A

Contraction of heart muscles

43
Q

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

A

Isovolumetric contraction

44
Q

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

A

Isovolumetric contraction

45
Q

Commotio cordis is heart failure due to what?

A

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

BIO202 (4 decks)

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