#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 circulatory system in the human body?
Gas exchange
Nutrient absorption
Transport of oxygen and nutrients
Excretion of waste products
#3
Which chamber of the heart pumps blood to the systemic circulation (to the body)?
Left Atrium
Right Atrium
Left Ventricle
Right Ventricle
#4
Which blood vessel carries deoxygenated blood from the heart to the lungs for oxygenation?
Pulmonary Artery
Pulmonary Vein
Aorta
Vena Cava
#5
What is the average resting heart rate for adults?
60-80 beats per minute
90-110 beats per minute
120-140 beats per minute
160-180 beats per minute
#6
Which component of blood is responsible for transporting oxygen?
Red Blood Cells
White Blood Cells
Platelets
Plasma
#7
What is the main function of the heart valves?
To regulate blood pressure
To control the heartbeat
To prevent backflow of blood
To produce blood cells
#8
In which blood vessels does the exchange of oxygen and carbon dioxide take place?
Arteries
Veins
Capillaries
Venules
#9
What is the term for the volume of blood ejected by one ventricle during a heartbeat?
Stroke Volume
Cardiac Output
End-Diastolic Volume
Ejection Fraction
#10
Which part of the heart initiates the heartbeat by generating electrical impulses?
Atrioventricular Node (AV Node)
Sinoatrial Node (SA Node)
Bundle of His
Purkinje Fibers
#11
Which blood vessel carries oxygenated blood from the lungs to the heart?
Pulmonary Artery
Pulmonary Vein
Aorta
Vena Cava
#12
What is the role of hemoglobin in the blood?
Blood clotting
Transport of oxygen
Immune defense
pH regulation
#13
What is the term for the contraction phase of the heart's pumping action?
Systole
Diastole
Cardiac Output
Ejection Fraction
#14
Which artery supplies oxygenated blood to the heart muscle itself?
Coronary Artery
Pulmonary Artery
Aorta
Carotid Artery
#15
Which of the following factors contributes to the development of atherosclerosis?
Low blood pressure
High-density lipoprotein (HDL) cholesterol
Inflammation of blood vessels
Regular exercise
#16
What is the purpose of the heart's semilunar valves?
Prevent backflow into the ventricles
Control blood flow between atria
Regulate blood pressure
Initiate the heartbeat
#17
What is the medical term for a heart attack?
Myocarditis
Angina Pectoris
Cardiomyopathy
Myocardial Infarction
#18
What is the function of the pericardium in the heart?
Regulate blood pressure
Produce red blood cells
Protect and lubricate the heart
Initiate electrical impulses