heart

Question 1

Following a drop of blood

Answer 1

blood from the body tissues comes in from veins (inferior or supiror vena cava, or the cornoary sinus), then flows into the right artium. traveling thouhg the tricuspid AV valve the blood then enters the right ventricle, till going though the pulmonary semilunar valve into the pulmonary arteries. After flowing through the lungs it returns to the heart though the pulmonary veins into the left artium then through the bicuspid(mirtal) AV valve into the left ventricle. Finally leaving thought the aortic semilunar valve into the aorta to return to the bodies tissues.

Question 2

returns to…

Deoxygenated blood

Answer 2

returns to the right side of the heart from the body tissues

Question 3

returns to…

oxygenated blood

Answer 3

the left side of the heart from the lungs

Question 4

veins bring blood to…

Answer 4

the heart

Question 5

arteries bring blood to…

Answer 5

the body

Question 6

SKIP 5/5

Question 7

Sinoatrial node

Answer 7

-in the right artium
-pace maker of the heart
-causes artial to contract at the same time

Question 8

P wave

Answer 8

atriole systole or atriole depolarization

Question 9

Atrioventricular node

Answer 9

-bottom of right atrium
-delay singal from sinoartial node to the ventricles
-pushes signal to budle of His

Question 10

Bundle of His

Answer 10

enters into the interventricular septum and splits into the budle branches

Question 11

bundle branches

Answer 11

seperate into purkinje fibers

Question 12

purkinje fibers

Answer 12

causes the ventricle to contract

Question 13

QRS wave

Answer 13

ventricular systole or ventricular depolarization

atrial repolarization or atrial diastole also occurs here

Question 14

T wave

Answer 14

ventricular repolarization or ventricular diastole

Question 15

cardiac conduction as a whole

Answer 15

sinoartial node causes artials to contract (artial systole/depolarization) (The P Wave) then the artioventricular node slows the signal then pushes it to the bundle of His which splits into budle branches finally spiliting into purkinje fibers causing the ventricle to contract (venticular systole/depolarization) (The QRS Wave) while the atrium relaxes (atrial diastole/repolarization), once the ventricles are done contracting the ventricles relaxe (venticular diastole/repolarization) (The T Wave)

Question 16

Cardiac Cycle

Answer 16

“starts” in passive ventricular filling, moves to artial systole, then isometric contraction, to ventricle systole, then isometric relaxation

Question 17

Passive venticular filling

Answer 17

-blood is flowing from the atriums to ventricles thought open AV valves (SL valves are closed)
-about 80% of the blood from artiums

determined by venous return - blood coming from the vena cava or pulmoary veins

Question 18

End Diastolic Volume

Answer 18

volume of blood in ventricles at the end of atrial systole and the “end” of ventricular diastole

Question 19

Arital systole

Answer 19

the artia contracts and pushes the remainder (~20%) of the blood in the aritum from passice ventricular filling into the ventricle - AV Valves are still open while the SV valves are closed

Question 20

isovolumetric contraction

Answer 20

all valves are closed
-very begining of ventricle systole
-needs x amount of pressure to ope the SL valves

Question 21

Ventricular Systole

Answer 21

-SL valves open and AV vales stay closed
-causes rapid ejection of blood from ventricles

Question 22

end systolic volume

Answer 22

volume of blood left in ventricles after systole (after rapid ejection)
-not all blood leaves ventricles in systole
-50-70% is rapidly ejected

Question 23

isovolumetric relaxation

Answer 23

-all valves close
-SL vavles are closed, but now AV valves need to open (meaning that the heart need to relax to allow the AV valves to open)

Question 24

Cardiac Output

Answer 24

Stoke Volume * Heart Rate

Question 25

Stoke volume

Answer 25

amount of blood pumped out of your ventricles PER BEAT

Question 26

Preload

Answer 26

stretch on ventricular myocardium caused by venous return

Question 27

afterload

Answer 27

pressure ventricles must overcome to eject blood during systole
-determined by perhipheral resistance

Question 28

chronotropic

Answer 28

affecting heart rate

Question 29

inotropic

Answer 29

affecting contractility

Question 30

-less venous return means…
-more venous return means…

in reference to preload

Answer 30

-less preload
-more preload

Question 31

High blood pressure causes…
Low blood pressure causes…

in refrence to afterload

Answer 31

-high afterload
-low afterload