40 Questions
Which chamber of the heart is responsible for pumping blood into the systemic circulation?
Left ventricle
What is the function of the pericardium?
To surround and protect the heart
What is the role of the atrioventricular valves in the heart?
To prevent backflow of blood into the ventricles
Which circulatory system is responsible for carrying oxygenated blood from the lungs to the heart?
Pulmonary circulation
What is the definition of blood pressure?
The force exerted by the blood against the inner walls of the blood vessels
During which phase of the cardiac cycle does the heart relax and fill with blood?
Diastole
What is the function of the pulse?
To indicate the strength of arterial wall stretch and recoil
What is the role of the sympathetic nervous system in peripheral resistance and blood pressure?
It causes vasoconstriction of arterioles, increasing blood pressure and resistance
How do cardiac muscle fibers differ from skeletal muscle fibers?
Cardiac muscle fibers have intercalated discs
What is the main function of the cardiovascular system?
To pump blood through the body
Which of the following is true about the cardiac conduction system?
Impulses travel from the SA node to the AV node to the bundle of His
What is the role of the AV node in the cardiac conduction system?
To allow time for atria to fill before impulse conduction across the atrial myocardium
What causes the first heart sound (Lub) during the cardiac cycle?
Closure of the AV valves
What determines the heart rate?
The sympathetic nervous system
What is the purpose of an electrocardiogram (ECG)?
To determine heart rhythm
What is the role of the sympathetic nervous system in myocardial contraction?
To increase the rate and force of myocardial contraction
What is the origin of the heartbeat?
Depolarization of the SA node
What determines the contractility of the myocardium at the molecular level?
Interaction of calcium ions with contractile proteins
What is the purpose of cardiac auscultation?
To listen to the sounds accompanying closure of the cardiac valves
What is the role of the AV node in the cardiac conduction system?
To allow time for atria to fill before impulse conduction across the atrial myocardium
Which of the following is responsible for preventing backflow of blood into the ventricles when it is pumped out?
Semilunar valve
Which of the following is NOT a function of the cardiovascular system?
Maintenance of normal blood glucose levels
Where is the heart located in a dog?
Between the third and sixth intercostal spaces
What is the outer surface of the heart called?
Epicardium
Which of the following separates the left and right sides of the heart?
Interatrial septum
Which of the following is responsible for perfusing tissues with a high resistance to blood flow?
Systemic arterial circulation
What is the force exerted by the blood against the inner walls of the blood vessels called?
Blood pressure
During which phase of the cardiac cycle does the heart relax and fill with blood?
Diastole
What is the difference between the systolic and diastolic pressures called?
Pulse pressure
What is responsible for limiting the flow of blood by creating friction between the blood and the arterial vessel wall?
Peripheral resistance
What is the role of the sinoatrial (SA) node in the heart's electrical conduction system?
It is responsible for initiating the electrical impulses that regulate the heart's rhythm
What is the function of the atrioventricular (AV) node in the heart's electrical conduction system?
It is responsible for conducting the electrical impulses from the atria to the ventricles
What is the significance of the bundle of His in the heart's electrical conduction system?
It is responsible for the contraction of the ventricles
What is the purpose of the Purkinje fibers in the heart's electrical conduction system?
They are responsible for the contraction of the ventricles
What is the function of the AV valves in the heart?
They prevent the backflow of blood from the atria to the ventricles
What is the purpose of cardiac auscultation?
To listen to the sounds of the heart to detect abnormalities
What determines the heart rate?
The rate of spontaneous depolarization of the SA node
What is the role of the sympathetic nervous system in the regulation of heart rate?
It increases the heart rate
What is the purpose of an electrocardiogram (ECG)?
To assess the electrical activity of the heart
What is the role of the sympathetic nervous system in myocardial contraction?
It increases the strength of myocardial contractions
Test your knowledge on the cardiovascular system with this quiz! Learn about the structure and functions of the cardiovascular system, divisions of the circulatory system, blood flow through the heart, blood pressure, the cardiac cycle, and what generates a pulse.
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