Ch. 21

Question 1

two circuits of the heart

Answer 1

pulmonary
systemic

Question 2

pulmonary circuit caries blood that is

Answer 2

oxygen poor blood

Question 3

pulmonary circuit order

Answer 3

right ventricle poor o2
o2 rich blood in left atrium

Question 4

systemic circuit order

Answer 4

o2 rich blood to left ventricle
o2 poor blood to the right atrium

Question 5

systemic circuit specializes for

Answer 5

cells and tissues

Question 6

heart is located in the

Answer 6

mediastinum

Question 7

mediastinum is the space between two

Answer 7

plueral cavities

Question 8

between parietal pericardium and visceral pericardium is

Answer 8

pericardial fluid

Question 9

apex is the

Answer 9

tip of the heart

Question 10

heart is slightly

Answer 10

left on the chest

Question 11

superior cells of the heart is the

Answer 11

epicardium

Question 12

below the epicardium is the

Answer 12

myocardium

Question 13

myocardium has

Answer 13

striated muscle cells connected by interca;ated discs

Question 14

innermost layer of heart is the

Answer 14

endocardium

Question 15

heart volume is mitochondria

Answer 15

25-35%

Question 16

intercalated discs include

Answer 16

gap junctions and desmosomes

Question 17

how many chambers in heart

Answer 17

4

Question 18

2 superior heart chambers

Answer 18

atria

Question 19

2 inferior heart chambners

Answer 19

ventricles

Question 20

chambers divided by

Answer 20

interatrial septum
interventricular septum

Question 21

heart atria volume increased by

Answer 21

auricles

Question 22

fossa ovalis marks location of

Answer 22

fetal foramen ovale

Question 23

oxygen poor blood enters right atrium via

Answer 23

superior vena cava
inferior vena cava
coronary sinus

Question 24

oxygen rich blood enters LA via

Answer 24

4 pulmonary veins

Question 25

heart ventricles are

Answer 25

discharging chambers

Question 26

papillary muscles project into

Answer 26

ventricular cavity and attach to valve es via chordae tendineae

Question 27

rv pumps oxygen poor blood to pulmonary circuit via

Answer 27

pulmonary trunk pulmonary arteries

Question 28

LV pump oxygen rich blood to the systemic circuit via

Answer 28

aorta

Question 29

tricuspid valve seperates

Answer 29

right atriujm from righ ventricle

Question 30

bicuspid valve seperates the

Answer 30

left a left v

Question 31

pulmonary semilunar valve is at the

Answer 31

base of the pulmonary trunk

Question 32

aortic semilunar valve is at the

Answer 32

base of the aorta

Question 33

pulmonary semilunar valve is for the

Answer 33

right side of the heart

Question 34

lub dub

Answer 34

close of pulmonary valve then aortic valve

Question 35

steps of heart ciruclation

Answer 35

coming in through systemic into the right atrium go through tricuspid valve left ventricle pulmonary semilunar valve pulmonary trunk pulmonary arteries lungs return through pulmonary veins left atrium through bicuspid valve left ventricle into aorta through aortic semilunar valve into aorta to a body

Question 36

coronary circulation supplies blood to the

Answer 36

muscle tissue of the heart

Question 37

cardio muscle is

Answer 37

autorhythmic

Question 38

electrical signals of the heart pumping start in the

Answer 38

sinoatrial node sa

Question 39

SA node located

Answer 39

superior area of heart

Question 40

AV node doesn't regularly send

Answer 40

messages by itself

Question 41

av node pacemaker goes through to the

Answer 41

av bundle

Question 42

purkinje fibers stimulate

Answer 42

walls of pulmanory trunk to contract

Question 43

heart rate is

Answer 43

intrinsic set by SA NODE

Question 44

sympathetic NS release

Answer 44

norepinephrine

Question 45

norepinephrine increases

Answer 45

HR and force of contraction

Question 46

parasympathetic NS releases

Answer 46

acetylcholine

Question 47

acetyclcholine decreases

Answer 47

heart rate

Question 48

myocardial infarction is a

Answer 48

heart attack

Question 49

cardiac arrhythmias means

Answer 49

irregular hb

Question 50

septal defect common for downsyndrome

Answer 50

atrioventricular