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Bio 142 - Summer > Exam 20 Flashcards > Flashcards

Exam 20 Flashcards

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Biology 101 flashcards
1
Q

Blood returning to the heart from the systemic circuit first enters the

A

Right atrium

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2
Q

A heart attack could come from the blockage of a/an:

A

Coronary artery

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3
Q

The earlike extension of the atrium is the:

A

Auricle

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4
Q

The right ventricle pumps blood to the

A

Right and left lungs

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5
Q

The left ventricle pumps blood to the

A

Aorta

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6
Q

_____________ carry blood away from the heart.

A

Arteries

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7
Q

The _________ covers the outer surface of the heart.

A

Epicardium

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8
Q

________ are the abnormal heart sounds caused by turbulent flow through faulty valves.

A

Murmurs

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9
Q

The bicuspid or mitral valve is located

A

Between the left atrium and left ventricle

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10
Q

The tricuspid valve prevents backward flow into the

A

Right atrium

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11
Q

The muscle layer of the heart is the ________

A

Myocardium

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12
Q

The _________ valve prevents backward flow into the left atrium

A

Bicuspid

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13
Q

The heart is roughly the size of

A

A man’s clenched fist

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14
Q

Depolarization of the ventricles is represented on an electrocardiogram by the

A

QRS complex

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15
Q

The P wave of the electrocardiogram is a signal from

A

Depolarization of the atria

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16
Q

The electric impulses of the heart is distributed into the heart muscle by the

A

Purkinje fibers

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17
Q

As a result of the long refractory period in the cardiac action potential, cardiac muscle cannot exhibit

A

Tetany

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18
Q

The semilunar valve that passes deoxygenated blood:

A

Pulmonary valve

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19
Q

Attach directly to the heart valves to prevent them from prolapsing during systole

A

Chordae tendonae

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20
Q

Intercalated discs serve to transfer ________ from cell to cell.

A

Ionic currents, action potentials, the force of contraction, and electrical signals

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21
Q

In the conduction pathway of the heart, what connects the SA and AV nodes?

A

Internodal pathway

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22
Q

Blood flowing through the aortic valve has just left the:

A

Left ventricle

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23
Q

The lungs receive blood vessels that just left the:

A

Right ventricle

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24
Q

Thickest myocardium is:

A

In the left ventricle

25
Q

Arteri-

A

An artery

26
Q

Athero-

A

Fatty degeneration

27
Q

Aur-

A

Ear

28
Q

Brachi-

A

Arm

29
Q

Brandy-

A

Slow

30
Q

Cardi-, Cardio-

A

Heart

31
Q

Diastol-

A

Relax

32
Q

Hemi-

A

Half

33
Q

Semi-

A

Half

34
Q

Systol-

A

Contract

35
Q

Tachy-

A

Swift

36
Q

-ac

A

Pertaining to

37
Q

-form

A

Shape

38
Q

-gram

A

Record

39
Q

Ejection fraction is typically a measurement of blood leaving the:

A

Left ventricle

40
Q

Visualizing the cardiac valves at work is BEST done by:

A

Echocardiogram

41
Q

At the end of a ventricular relaxation, the ventricles will contain the greatest amount of blood. This volume is known as

A

End systolic volume

42
Q

The force the heart must overcome to eject blood is the

A

Afterload

43
Q

The difference between the end diastolic volume and the end systolic volume is the

A

Stroke volume

44
Q

When you multiply stroke volume by the number of times the heart beats per minute, you can find the

A

Cardiac output

45
Q

Meghan had a heart murmur when she was a newborn infant, and an ultrasound had shown she had blood leaking from her right atrium to her left atrium, caused by a persistent

A

Foramen ovale

46
Q

The innermost layer of the heart is the

A

Endocardium

47
Q

If your girlfriend says that your singing her favorite song “tugs on her heartstrings”, she probably is not really thinking about her _____________ ______________.

A

Chordae tendineae

48
Q

Oxygenated blood passes through a semilunar valve known as the

A

Aortic valve

49
Q

Aravind was diagnosed with aortic stenosis. Without surgical repair, it would put grave strain on the ________ restricting outflow and requiring increased muscular force to push blood into systemic circulation.

A

Left ventricle

50
Q

The end systolic volume is the

A

Amount of blood remaining in each ventricle following contraction

51
Q

Cardiac output is

A

The amount of blood pumped by each ventricle during one minute

52
Q

In the developing fetus, blood is shunted away from the lungs through the __________________, which connects the pulmonary trunk (artery) to the aorta.

A

Ductus arteriosus

53
Q

An EKG best gives a depiction of:

A

Electric activity of the heart

54
Q

A reversible lack of blood flow to tissues is best referred to as a/an

A

Ischemia

55
Q

In the event of an ectopic pacemaker, the electrical activity is being generated somewhere other than the:

A

SA node

56
Q

The visceral pericardium is also known as the _______________.

A

Epicardium

57
Q

The muscular ridges inside the ventricles are called:

A

Trabeculae carnae

58
Q

Treppe formation of muscle contraction happens in the heart because

A

Calcium stays in the cytoplasm after contraction

59
Q

KNOW HOW TO LABEL THE HEART

A

Bio 142 - Summer (11 decks)

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