#1
What is the primary function of the heart?
To pump blood
To digest food
To filter toxins
To produce hormones
#2
Which blood vessels carry oxygenated blood away from the heart?
Veins
Arteries
Capillaries
Venules
#3
In which blood vessels does gas exchange occur in the cardiovascular system?
Arteries
Veins
Capillaries
Venules
#4
Which of the following is a risk factor for cardiovascular diseases?
Regular exercise
Low cholesterol levels
Smoking
Adequate sleep
#5
What is the medical term for high blood pressure?
Hypertension
Hypotension
Aneurysm
Arrhythmia
#6
What is the primary function of the cardiovascular system?
Respiration
Digestion
Transportation of oxygen and nutrients
Excretion
#7
What is the function of valves in the heart?
To regulate blood pressure
To prevent backflow of blood
To produce hormones
To digest food
#8
Which chamber of the heart receives deoxygenated blood?
Left atrium
Right atrium
Left ventricle
Right ventricle
#9
Which vessel carries blood from the lungs to the heart?
Pulmonary artery
Pulmonary vein
Aorta
Superior vena cava
#10
What is the main component of blood responsible for oxygen transport?
Red blood cells
White blood cells
Platelets
Plasma
#11
Which major blood vessel carries deoxygenated blood from the body back to the heart?
Aorta
Pulmonary artery
Superior vena cava
Inferior vena cava
#12
What is the function of the pericardium?
To regulate blood pressure
To produce hormones
To protect and lubricate the heart
To filter toxins
#13
What is the term for the relaxation phase of the heart's cycle?
Systole
Diastole
Aneurysm
Ischemia
#14
Which part of the conduction system coordinates the contraction of the ventricles?
Sinoatrial node (SA node)
Atrioventricular node (AV node)
Bundle of His
Purkinje fibers
#15
What is the medical term for a heart attack?
Myocarditis
Arrhythmia
Myocardial infarction
Atherosclerosis
#16
What is the term for the volume of blood pumped by the heart per minute?
Stroke volume
Cardiac output
End-diastolic volume
Ejection fraction
#17
Which coronary artery is often referred to as the 'widowmaker'?
Left main coronary artery
Right coronary artery
Left anterior descending artery
Circumflex artery
#18
Which hormone is produced by the heart and regulates blood pressure and fluid balance?
Insulin
Cortisol
Aldosterone
Atrial natriuretic peptide (ANP)