12 Questions
What is the function of the aortic and pulmonary valves?
To prevent backflow of blood from the aorta and pulmonary trunk into the ventricles during diastole
Where is the SA node located?
In the posterior wall of the right atrium near the entrance of the superior vena cava
What is the role of the AV node in the cardiac conduction system?
It receives the impulse from the SA node and transmits it to the Bundle of His.
Which nervous system has the dominant effect on myocardial contractility?
The sympathetic nervous system has the dominant effect.
What are the two main branches of the right coronary artery (RCA)?
The Right posterior descending artery and the Right acute marginal artery
What is the name of the single vessel exiting the right ventricle?
Pulmonary trunk
What is the function of the pericardial fluid between the two layers of the pericardium?
To minimize friction during cardiac contraction
How many chambers make up each half of the heart?
Two
What is the function of the semilunar valves?
To allow blood to flow from the ventricles into the arteries
What is the purpose of the chordae tendineae in the right ventricle?
To anchor the tricuspid valve
What is the difference between the inflow and outflow regions of the right ventricle?
The inflow region receives blood from the right atrium, while the outflow region ejects blood into the pulmonary arteries
What is the function of the papillary muscles in the right ventricle?
To anchor the chordae tendineae and prevent prolapse of the tricuspid valve
Learn about the structure of the pericardium, the double-walled sac that surrounds the heart. Understand the composition of the outer parietal pericardium and the inner visceral pericardium, along with the pericardial space between them.
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