#1
Which chamber of the heart receives oxygenated blood from the lungs?
Left atrium
Right atrium
Left ventricle
Right ventricle
#2
What is the cardiac output of the heart?
Volume of blood pumped per beat
Number of heartbeats per minute
Total volume of blood in the heart
Blood pressure in the aorta
#3
Which blood vessel carries oxygenated blood from the lungs to the heart?
Pulmonary artery
Pulmonary vein
Aorta
Superior vena cava
#4
What is the term for the volume of blood pumped by each ventricle in one minute?
Cardiac output
Stroke volume
Ejection fraction
Heart rate
#5
Which heart valve is located between the left atrium and left ventricle?
Aortic valve
Tricuspid valve
Mitral valve
Pulmonary valve
#6
What is the function of the heart's valves?
To regulate blood pressure
To prevent backflow of blood
To produce red blood cells
To aid in digestion
#7
What is the term for the contraction phase of the cardiac cycle?
Diastole
Systole
Aneurysm
Ischemia
#8
Which part of the heart's conduction system delays the electrical impulse to allow the atria to contract before the ventricles?
Atrioventricular (AV) node
Sinoatrial (SA) node
Bundle of His
Purkinje fibers
#9
What is the primary function of the pericardium?
To regulate blood pressure
To provide oxygen to the heart muscle
To protect and lubricate the heart
To facilitate gas exchange
#10
What is the primary function of the atrioventricular (AV) valves in the heart?
To prevent backflow of blood into the atria
To regulate blood pressure
To control the heartbeat
To facilitate gas exchange
#11
Which coronary artery is often referred to as the 'widow-maker'?
Left anterior descending (LAD)
Left circumflex
Right coronary
Posterior descending
#12
What is the function of the sinoatrial (SA) node in the heart?
Conduction of electrical impulses
Pumping blood to the body
Regulating blood pressure
Producing red blood cells
#13
Which of the following factors can contribute to the development of atherosclerosis?
High-density lipoprotein (HDL)
Low blood pressure
Regular exercise
High levels of LDL cholesterol
#14
What is the term for the relaxation phase of the cardiac cycle?
Diastole
Systole
Aneurysm
Ischemia
#15
What is the role of the sympathetic nervous system in cardiac physiology?
Slowing down the heart rate
Increasing heart rate and contractility
Regulating blood pressure
Facilitating gas exchange