Chapter 19 Practice Quiz Flashcards
The S1(first) sound of the heart is caused by the _______ of the ______.
Closing; AV valves
Which of the following is TRUE of the heart?
It is posterior to the sternum and anterior to the vertebral column
It is found within the mediastinum
It contains 4 chambers
The left atrium receives oxygenated blood from the pulmonary circuit
A decrease in venous return will cause stroke volume to _____________________________
decrease
As end diastolic volume increases , stroke volume will__________________________________________
increase
Which of the following is TRUE?
The left ventricle is the pump of the systemic circuit.
The heart is found in the mediastinum.
The heart contains 2 pumps arranged in series.
The left ventricle generates more pressure than the right ventricle
Excessively high heart rate will cause ventricular filling time to __________________, end diastolic volume to ___________________________________preload to ________________________________________and stroke volume to _________________________________________
decrease / decrease /decrease / decrease
The sequence of contraction of the heart chambers is:
Both atria followed by both ventricles
Which of the following is TRUE?
Cardiac output from right ventricle is equal to cardiac output from left ventricle
As blood flows from the aorta to the right atrium , its oxygen content will_______________
decrease
Which of the following contains deoxygenated blood?
Coronary sinus
The _____________ prevents backflow from the right ventricle into the right atrium
tricuspid valve
Which of the following has the fastest rate of spontaneous rhythmic depolarization?
Sinoatrial node
The right side of the heart is associated with the ___________ circulation and the left side of the heart is associated with the ________ circulation.
Pulmonary; systemic
An increase in contractility will cause stroke volume to __________________________
increase
End diastolic volume is
amount of blood in each ventricle at the end of ventricular diastole
Which chamber of the heart has the thickest wall?
Left ventricle
Which of the following describe(s) cardiac contractile cells?
Striated
Branching
Uninucleate
Most numerous cell in the myocardium
What structures work to prevent prolapse (i.e., flipping up) of the atrioventricular valves?
chordae tendineae
The 2nd heart sound is heard when the:
Semilunar valves close
The following are a list of vessels and structures associated with the heart.
1) Right atrium
2) Left atrium
3) Right ventricle
4) Left ventricle
5) Vena cavae
6) Aorta
7) Pulmonary trunk
8) Pulmonary veins
5,1,3,7,8,2,4,6
Which of the following links AV valve flaps to the papillary muscles?
Chordae tendineae
P wave on ECG represents
depolarization of the the atria
As blood flows from the left atrium to the ascending aorta , its oxygen content will________
stay the same
Blood is prevented from backflowing INTO the right ventricle by the:
pulmonary valve
Which of the following is TRUE?
Cardiac output is the volume of blood pumped by each ventricle per minute.
Cardiac output is the product of heart rate and stroke volume
Stroke volume is the amount of blood ejected from the ventricle each beat
All of the following vessels empty into the right atrium
Superior vena cava
Inferior vena cava
coronary sinus
Calculate stroke volume given the following: EDV - 120 cc, ESV - 40 cc
80 cc
How does sympathetic nervous system increase stroke volume?
By increasing contractility of the ventricles
Pericardial fluid is found between the parietal serous pericardium and the _____________.
Epicardium
Increase in afterload will lead to ______________________of stroke volume
decrease
Put the following components of the conduction system of the heart in the correct order:
- Purkinje Fibers
- SA node
- AV bundle
- AV node
- Bundle Branches
2 4 3 5 1
A moderate increase in ventricular stretch due to increased venous return would _________________________ contractility of the ventricle.
increase
The depression in the adult interatrial septum is the _______________.
Fossa ovalis
During early ventricular systole (isovolumetric contraction) , the AV valves are ________ and the semilunar valves are __________.
Closed – closed
