Pre Lab Quiz For Heart

Front 1

cardivascular system consists of

Back 1

>consists of the heart, blood vessels, and blood

Front 2

where does the heart recieve blood from?

Back 2

via the vessels

Front 3

arteries?

Back 3

usually carry blood away from the heart

Front 4

veins

Back 4

usually carry deoxygenated blood towards the heart

Front 5

which veins and arteries are the exception?

Back 5

pulmonary arteries and veins

Front 6

where is the heart located?

Back 6

in the mediastinum

Front 7

what is the mediastinum

Back 7

between the sternum, the lungs, and thoracic vertebrae

Front 8

what is the pericardium?

Back 8

a double wall sac enclosing the heart

Front 9

The ? is double-walled sac enclosing the heart

Back 9

pericardium

Front 10

which is the outer layer and which is the inner?

Back 10

parietal (outer)
visceral(inner)

Front 11

what is the visceral layer also reffered to as?

Back 11

epicardium

Front 12

three layers of the heart?

Back 12

Epicardium -same as visceral which lines the heart
Myocardium -biggest
Endocardium -lines heart chambers

Front 13

how does blood enter the right atrium via

Back 13

superior vena cava and inferior vena cava

Front 14

what happens once blood enters the right atrium

Back 14

blood flows through the tricuspid AV valve into the right ventricle

Front 15

what happens after the ventricle contracts?

Back 15

blood flows through the pulmonary semilunar valve and into the pulmonary arteries

Front 16

what do the pulmonary arteries do?

Back 16

deliver blood to the lungs where it is enriched with oxygen and exits pulmonary veins

Front 17

where is oxygenated blood delivered?

Back 17

left atrium pushed through bicuspid AV valve into the left ventricle

Front 18

what happens from there?

Back 18

From here the blood is pushed through the systemic semilunar valve, and the aorta and then out into the body.

Front 19

about the large heart vein?

Back 19

This large vein arises at the apex of the heart and passes toward the atria in the anterior interventricular groove.

Front 20

what happens after reaching the atrioventricular groove?

Back 20

it bends posteriorly around the left side of the heart to enter the coronary sinus

Front 21

what does the small cardiac vein do?

Back 21

drains capillaries from the posterior aspect of the left ventricle and joins the coronary sinus

Front 22

what does the middle cardiac vein do?

Back 22

drains blood from the apex of the ventricles and runs along the posterior surface of the ventricles to join the cardiac sinus.

Front 23

what is the coronary sinus

Back 23

is a wide venous channel on the posterior surface of the heart that receives blood from the cardiac veins and returns it to the right atrium. It opens into the medial wall of the right atrium.

Front 24

action potentials originate?

Back 24

sinoatrial node (SA node)

Front 25

then what happens to action potentials

Back 25

Travel across atrial wall to atrioventricular node (AV node)

They pass slowly through atrial wall so atria can contract

APs pass rapidly through atrioventricular bundle and divides into left and right bundle branches

APs descend quickly to the apex of each ventricle. Here they are carried by Purkinje fibers to the ventricle walls.

Front 26

cardiac muscle is?

Back 26

autorythmic

Front 27

where are barorecptors located and what is response

Back 27

in cartoid sinus and arch of the aorta
they repsond to increase in blood pressure

Front 28

what does increased blood pressure do?

Back 28

stretches cartoid arteries and aorta

Front 29

what do baroreceptors increase?

Back 29

action potential generation

Front 30

action potentials are?

Back 30

conducted to medulla oblongata (via glossopharyngeal nerve from baroreceptors in carotid sinus and vagus nerve from baroreceptors in aortic arch)

Front 31

what happens

Back 31

parasympethic stimulation to the heart increases this decreases heart rate and stroke volume

Front 32

what happens to blood vessels due to decreased sympathetic stimulation?

Back 32

vasodilation

Front 33

what work together?

Back 33

vasodilation as well as dec. heart rate, stroke volume work together to bring blood pressure back to normal.

Front 34

what is the space between the two layers?

Back 34

pericardial cavity
-filled with serous fluid

Front 35

what do both layers of the heart have?

Back 35

mesothelium
which produces serous fluid

Front 36

heart wall has ?

Back 36

3 layers

Front 37

are coronary veins merge into?

Back 37

coronary sinus