#1
Which chamber of the heart receives deoxygenated blood from the body?
Left atrium
Right atrium
Left ventricle
Right ventricle
#2
What is the primary function of the cardiovascular system?
To deliver oxygen and nutrients to cells
To produce hormones
To regulate body temperature
To provide structural support
#3
Which of the following is NOT a major type of blood vessel in the body?
Artery
Vein
Capillary
Lymphatic vessel
#4
What is the approximate resting heart rate for a healthy adult?
60-80 beats per minute
90-120 beats per minute
30-40 beats per minute
130-150 beats per minute
#5
Which blood vessel carries oxygenated blood from the lungs to the heart?
Pulmonary artery
Pulmonary vein
Aorta
Vena cava
#6
What is the term for the widening of blood vessels?
Vasoconstriction
Vasodilation
Hemostasis
Thrombosis
#7
Which blood vessel carries oxygenated blood away from the heart to the body?
Pulmonary artery
Pulmonary vein
Aorta
Vena cava
#8
What is the role of valves in the cardiovascular system?
To regulate blood pressure
To prevent backflow of blood
To produce red blood cells
To control heart rate
#9
What is the pacemaker of the heart?
Atrioventricular (AV) node
Sinoatrial (SA) node
Purkinje fibers
Bundle of His
#10
Which of the following factors can increase blood pressure?
Decreased blood volume
Decreased arterial stiffness
Decreased sympathetic nervous system activity
Increased sodium intake
#11
What is the term for the contraction phase of the cardiac cycle?
Systole
Diastole
Arrhythmia
Bradycardia
#12
What is the term for a blockage in a blood vessel that interrupts blood flow to the heart muscle?
Myocardial infarction
Angina pectoris
Atherosclerosis
Coronary thrombosis
#13
Which of the following is responsible for the lub-dub sound of the heart?
Opening and closing of the atrioventricular valves
Opening and closing of the semilunar valves
Contraction and relaxation of the atria
Contraction and relaxation of the ventricles
#14
What is the term for a rapid and irregular heart rhythm?
Bradycardia
Tachycardia
Arrhythmia
Fibrillation
#15
Which of the following factors can contribute to the development of hypertension?
Regular exercise
Healthy diet low in sodium
Obesity
Adequate sleep
#16
What is the term for the volume of blood ejected from the heart in one contraction?
Cardiac output
Stroke volume
End-diastolic volume
Ejection fraction
#17
Which layer of the heart wall is responsible for pumping blood?
Endocardium
Myocardium
Epicardium
Pericardium
#18
What is the main function of the lymphatic system in relation to the cardiovascular system?
To regulate blood pressure
To transport oxygen to tissues
To remove excess fluid and waste products from tissues
To produce red blood cells
#19
Which of the following is responsible for carrying deoxygenated blood to the lungs for oxygenation?
Aorta
Pulmonary vein
Pulmonary artery
Superior vena cava
#20
What is the Frank-Starling law of the heart?
It states that heart rate increases with exercise
It describes the relationship between stroke volume and end-diastolic volume
It regulates the production of red blood cells
It controls the electrical impulses in the heart