NU110 PJ Exam Questions with complete Answers
Which structure of the heart prevents backflow of blood from the right ventricle to the right
atrium?
Tricuspid valve
What is the primary function of the sinoatrial (SA) node?
To initiate the electrical impulses that regulate the heartbeat
Which layer of the heart wall is responsible for the contraction of the heart?
Myocardium
Which phase of the cardiac cycle is associated with ventricular contraction?
Systole
What is the purpose of the coronary arteries?
To supply blood to the myocardium
Which of the following accurately describes the flow of blood through the heart?
Right atrium>Right ventricle>Pulmonary artery>Lungs
The term "preload" in cardiac physiology refers to:
The volume of blood in the ventricles at the end of diastole
What is the role of the atrioventricular (AV) node in the heart's conduction system?
To delay the electrical impulse, allowing the atria to contract before the ventricles
Which of the following factors increases the heart's contractility?
Increased sympathetic stimulation
During diastole, the heart muscle:
Relaxes and allows the chambers to fill with blood
, What is afterload in the context of cardiac function ?
The resistance the left ventricle must overcome to eject blood
Which structure of the heart is responsible for receiving deoxygenated blood from the body?
Right atrium
Which of the following correctly lists the sequence of the heart's conduction system?
SA node>AV node>Bundle of His>Purkinje fibers
What is the relationship between the systole and diastole in the cardiac cycle?
Systole is the contraction phase, and diastole is the relaxation phase
Which of the following is a function of the right ventricle?
Pumping deoxygenated blood to the lungs
The pacemaker of the heart is located in which structure?
Right atrium
Which term describes the volume of blood ejected by the heart in one minute?
Cardiac output
Which of the following best describes the function of the mitral valve?
It prevents backflow of blood into the left atrium
The sympathetic nervous system primarily affects the heart by:
Increasing heart rate and contractility
Which of the following is a determinant of blood pressure?
Cardiac output
Which type of blood vessel carries blood away from the heart?
Arteries
Which structure of the heart prevents backflow of blood from the right ventricle to the right
atrium?
Tricuspid valve
What is the primary function of the sinoatrial (SA) node?
To initiate the electrical impulses that regulate the heartbeat
Which layer of the heart wall is responsible for the contraction of the heart?
Myocardium
Which phase of the cardiac cycle is associated with ventricular contraction?
Systole
What is the purpose of the coronary arteries?
To supply blood to the myocardium
Which of the following accurately describes the flow of blood through the heart?
Right atrium>Right ventricle>Pulmonary artery>Lungs
The term "preload" in cardiac physiology refers to:
The volume of blood in the ventricles at the end of diastole
What is the role of the atrioventricular (AV) node in the heart's conduction system?
To delay the electrical impulse, allowing the atria to contract before the ventricles
Which of the following factors increases the heart's contractility?
Increased sympathetic stimulation
During diastole, the heart muscle:
Relaxes and allows the chambers to fill with blood
, What is afterload in the context of cardiac function ?
The resistance the left ventricle must overcome to eject blood
Which structure of the heart is responsible for receiving deoxygenated blood from the body?
Right atrium
Which of the following correctly lists the sequence of the heart's conduction system?
SA node>AV node>Bundle of His>Purkinje fibers
What is the relationship between the systole and diastole in the cardiac cycle?
Systole is the contraction phase, and diastole is the relaxation phase
Which of the following is a function of the right ventricle?
Pumping deoxygenated blood to the lungs
The pacemaker of the heart is located in which structure?
Right atrium
Which term describes the volume of blood ejected by the heart in one minute?
Cardiac output
Which of the following best describes the function of the mitral valve?
It prevents backflow of blood into the left atrium
The sympathetic nervous system primarily affects the heart by:
Increasing heart rate and contractility
Which of the following is a determinant of blood pressure?
Cardiac output
Which type of blood vessel carries blood away from the heart?
Arteries
