Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

general nursing tingz!🧸🩺🌠 > how that heart pumpin' ❤🩸 > Flashcards

how that heart pumpin' ❤🩸 Flashcards

1
Q

what do the sa node do?

A

the sa node be the boss of the heart, control the atria and set the rhythm.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

what’s the av node’s role?

A

the av node be the bouncer, delay the signal from the sa node to the ventricles.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

what does the bundle of his do?

A

the bundle of his carry the signal from the av node down to the ventricles.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

where the bundle of his at in the heart?

A

a medial, centralized little guy coming off of the AV node on AV node’s left side.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

what’s the bundle of branches?

A

it splits off into left and right around the ventricles and carries the electrical signal from the bundle of his to the pukinje fibers.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

what’s up with the purkinje fibers?

A

purkinje fibers spread the signal through the ventricles so they contract.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

what happens when the bundle of his splits?

A

it splits into the left and right bundle of his branches for each ventricle.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

how does the right bundle of his branches work?

A

it send signals to the right ventricle to make it pump.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

how about the left bundle of his branches?

A

it send signals to the left ventricle so it can pump too.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

why’s the av node important?

A

it make sure the atria finish pumping before the ventricles start.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

what do the capillaries do in the lungs?

A

capillaries surround alveoli and carry oxygenated blood to the pulmonary venules.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

how does gas exchange happen in the alveoli?

A

o2 moves from alveoli to blood, co2 moves from blood to alveoli.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

what be the function of the pulmonary artery?

A

pulmonary artery carry deoxygenated blood to the lungs.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

how many parts the pulmonary artery have?

A

the pulmonary artery split into two parts, one for each lung.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

where does the pulmonary artery flow to and from?

A

it flows from the right ventricle to the lungs.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

what about the pulmonary veins?

A

pulmonary veins bring oxygenated blood back to the left atrium.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

how many parts the pulmonary veins have?

A

there be four pulmonary veins, two from each lung.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

where do the pulmonary veins flow to and from?

A

they flow from the lungs to the left atrium.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

what makes the left ventricle special?

A

the left ventricle be the strongest part, push blood through the aorta.

20
Q

how does the sa node affect heart rate?

A

it set the pace, makin’ the heart beat faster or slower.

21
Q

what happens if the sa node fail?

A

if the sa node fail, the av node take over but at a slower rate.

22
Q

what triggers the sa node to fire?

A

sinoatrial (sa) node fires due to its own natural pacemaker activity, which is regulated by the flow of ions across the sa node cell membrane (fyi, hormones and nerves can speed it up).

23
Q

how does the heart muscle contract?

A

the electrical signals cause muscle fibers to shorten, pumpin’ the blood.

24
Q

why are the bundle of branches important?

A

they ensure both ventricles contract at the same time, pumpin’ blood together.

25
Q

what’s the sequence of heart contractions?

A

atria contract first, then the ventricles, all controlled by the electrical signals.

26
Q

what role does the autonomic nervous system play?

A

it helps adjust heart rate based on body’s needs, like stress or rest.

27
Q

how do oxygen and nutrients get to the heart muscle?

A

they travel through the coronary arteries, which branch off the aorta.

28
Q

what’s the purpose of the valves in the heart?

A

valves make sure blood flows in one direction, preventin’ backflow.

29
Q

what are the major valves in the heart?

A

the major valves be the tricuspid, pulmonary, mitral (bicuspid), and aortic valves.

30
Q

how does the heart maintain its rhythm?

A

the sa node keeps it steady, while the av node supports and can take over if sa node fails.

31
Q

what happens during a heart attack?

A

during a heart attack, a plaque (built up from fatty deposits) ruptures in the coronary artery, and this triggers a blood clot to form in that artery.

that blood clot blocks the flow of oxygenated blood to that part of the heart. that part starts to die (aka infarct) from the lack of oxygen. the longer the blockage lasts, the more heart tissue overall is damaged.

32
Q

what’s an electrocardiogram (ecg or ekg)?

A

in an ecg/ekg, the machine measures the electrical activity of the heart, showing the heart’s rhythms and patterns.

33
Q

what are the four chambers of the heart?

A

the four chambers be the right atrium, left atrium, right ventricle, and left ventricle.

34
Q

what defines a vein?

A

a vein be a blood vessel that carries blood back to the heart.

35
Q

what defines an artery?

A

an artery be a blood vessel that carries blood away from the heart.

36
Q

what’s the superior vena cavae?

A

the superior vena cavae carry deoxygenated blood from the upper body to the heart.

37
Q

what’s the inferior vena cavae?

A

the inferior vena cavae carry deoxygenated blood from the lower body to the heart.

38
Q

how does blood flow through the heart?

A

blood flow from the body to the right atrium, to the right ventricle, to lungs, back to left atrium, then left ventricle to the body.

39
Q

what’s diffusion?

A

diffusion be when substances move from high concentration to low concentration.

40
Q

how does diffusion work in the alveoli?

A

o2 from the air move into blood, while co2 from blood moves into the air.

41
Q

where the sa node located?

A

the sa node be in the right atrium, near where the vena cavae enter.

42
Q

where the av node located?

A

the av node be between the atria and ventricles, in the lower part of the right atrium.

43
Q

what does sa node stand for?

A

sa node stand for sinoatrial node.

44
Q

what does av node stand for?

A

av node stand for atrioventricular node.

45
Q

electrical activity vs electrical impulses

A

electrical impulses are the “waves” of energy traveling through the heart.

electrical activity is the whole picture from those waves.

46
Q

what causes the heart cells to contract and relax?

A

electrical impulses.

general nursing tingz!🧸🩺🌠 (8 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions