#1
Which chamber of the heart receives oxygenated blood from the lungs?
Left atrium
Right atrium
Left ventricle
Right ventricle
#2
What is the primary function of red blood cells in the circulatory system?
Transporting oxygen
Fighting infections
Producing hormones
Digesting nutrients
#3
What is the average resting heart rate for adults?
50-60 beats per minute
70-80 beats per minute
90-100 beats per minute
110-120 beats per minute
#4
Which valve separates the left atrium from the left ventricle in the heart?
Tricuspid valve
Bicuspid valve (mitral valve)
Pulmonary valve
Aortic valve
#5
What is the function of the coronary arteries in the heart?
Transporting oxygenated blood to the heart muscle
Pumping blood to the rest of the body
Filtering impurities from the blood
Producing red blood cells
#6
Which gas is transported by red blood cells in the circulatory system?
Oxygen
Carbon dioxide
Nitrogen
Hydrogen
#7
Which blood vessel carries oxygenated blood away from the heart?
Vein
Artery
Capillary
Vena cava
#8
What is the medical term for high blood pressure?
Hypotension
Hypertension
Hypoglycemia
Hyperglycemia
#9
What is the main function of the cardiovascular system?
Transporting nutrients
Maintaining body temperature
Producing enzymes
Circulating blood and oxygen
#10
Which of the following is a symptom of a heart attack?
Persistent cough
Sudden loss of vision
Chest pain or discomfort
Joint pain
#11
What is the name of the largest artery in the human body?
Aorta
Pulmonary artery
Coronary artery
Carotid artery
#12
Which of the following can contribute to the development of atherosclerosis?
Low cholesterol levels
Regular exercise
High blood pressure
Adequate sleep
#13
Which of the following is NOT a risk factor for cardiovascular diseases?
Smoking
Regular exercise
High cholesterol
Obesity
#14
What is the role of platelets in the blood?
Carrying oxygen
Clotting to prevent bleeding
Transporting nutrients
Fighting infections
#15
In the human circulatory system, what is the function of veins?
Carry oxygenated blood to the heart
Carry deoxygenated blood away from the heart
Pump blood to the body
Initiate blood clotting
#16
What is the condition characterized by the accumulation of fatty deposits on the inner walls of arteries?
Angina
Atherosclerosis
Embolism
Thrombosis
#17
In the cardiac cycle, what does diastole refer to?
Contraction of the heart chambers
Relaxation of the heart chambers
Electrical signal transmission
Blood clot formation