NUR 257 TEST 1 QUESTIONS AND
ANSWERS WITH COMPLETE
SOLUTIONS 100% CORRECT!!!
Question: What are the three layers of the heart and where are they located?
Answer: ✔✔ Epicardium (outer protective layer), Myocardium (middle
muscle tissue of the heart), and Endocardium (thin inner layer lining the
chambers).
Question: What valve is located between the right atrium and right ventricle?
Answer: ✔✔ Tricuspid Valve
Question: What valve is between the left atrium and left ventricle?
Answer: ✔✔ Mitral Valve (Bicuspid Valve)
Question: What do the coronary arteries do?
Answer: ✔✔ Supply oxygenated blood to the heart muscle (myocardium).
Question: What does the cardiac conduction system consist of?
Answer: ✔✔ SA node, AV node, Bundle of His, right and left bundle branches,
and Purkinje fibers.
What is hemodynamics? -ANSWER ✔✔the balance of your body
Blood flow through the heart -ANSWER ✔✔1-Superior & Inferior Vena Cava, 2-
Rt Atrium, 3-Tricuspid Valve, 4- Rt Ventricle, 5-Pulmonary Valve, 6-Pulmonary
Artery, 7- Lungs-pick up oxygen, 8-Pulmonary Veins, 9- Lt Atrium, 10- Mitral
Valve (Bicuspid), 11-Lt Ventricle, 12- Aortic Valve, 13-Aorta, 14- Body
What is the pacemaker of the heart? -ANSWER ✔✔SA node
, Electrical activation of cells "Excitement"
(caused by influx of sodium into cell while potassium exits cell) -ANSWER
✔✔Depolarization
Return of Cells to resting state "Relaxation"
(caused by reentry of potassium into cell while sodium exits) -ANSWER
✔✔Repolarization
The time in between excitement and relaxation where they need to fill back up to
get energy to go again
(sandwich and a nap) -ANSWER ✔✔Refractory Period
The number of cardiac cycles is equal to? -ANSWER ✔✔Heart Beat
Each cardiac cycle has three major sequential events........ -ANSWER ✔✔Diastole
-when the heart fills with blood
Atrial systole
-atrial contracts and moves blood to ventricle
Ventricular systole
-ventricle ejects blood out of heart
Cardiac Output (CO) -ANSWER ✔✔measurement of the amount of blood ejected
per minute from the heart
ANSWERS WITH COMPLETE
SOLUTIONS 100% CORRECT!!!
Question: What are the three layers of the heart and where are they located?
Answer: ✔✔ Epicardium (outer protective layer), Myocardium (middle
muscle tissue of the heart), and Endocardium (thin inner layer lining the
chambers).
Question: What valve is located between the right atrium and right ventricle?
Answer: ✔✔ Tricuspid Valve
Question: What valve is between the left atrium and left ventricle?
Answer: ✔✔ Mitral Valve (Bicuspid Valve)
Question: What do the coronary arteries do?
Answer: ✔✔ Supply oxygenated blood to the heart muscle (myocardium).
Question: What does the cardiac conduction system consist of?
Answer: ✔✔ SA node, AV node, Bundle of His, right and left bundle branches,
and Purkinje fibers.
What is hemodynamics? -ANSWER ✔✔the balance of your body
Blood flow through the heart -ANSWER ✔✔1-Superior & Inferior Vena Cava, 2-
Rt Atrium, 3-Tricuspid Valve, 4- Rt Ventricle, 5-Pulmonary Valve, 6-Pulmonary
Artery, 7- Lungs-pick up oxygen, 8-Pulmonary Veins, 9- Lt Atrium, 10- Mitral
Valve (Bicuspid), 11-Lt Ventricle, 12- Aortic Valve, 13-Aorta, 14- Body
What is the pacemaker of the heart? -ANSWER ✔✔SA node
, Electrical activation of cells "Excitement"
(caused by influx of sodium into cell while potassium exits cell) -ANSWER
✔✔Depolarization
Return of Cells to resting state "Relaxation"
(caused by reentry of potassium into cell while sodium exits) -ANSWER
✔✔Repolarization
The time in between excitement and relaxation where they need to fill back up to
get energy to go again
(sandwich and a nap) -ANSWER ✔✔Refractory Period
The number of cardiac cycles is equal to? -ANSWER ✔✔Heart Beat
Each cardiac cycle has three major sequential events........ -ANSWER ✔✔Diastole
-when the heart fills with blood
Atrial systole
-atrial contracts and moves blood to ventricle
Ventricular systole
-ventricle ejects blood out of heart
Cardiac Output (CO) -ANSWER ✔✔measurement of the amount of blood ejected
per minute from the heart
