#1
Which blood vessels carry oxygenated blood away from the heart?
Arteries
ExplanationArteries carry oxygenated blood away from the heart.
#2
What is the average resting heart rate for adults?
60-80 beats per minute
ExplanationThe average resting heart rate for adults is 60-80 beats per minute.
#3
What is the role of the sinoatrial (SA) node in the heart?
Initiate the heartbeat by generating electrical signals
ExplanationThe SA node initiates heartbeats by generating electrical signals.
#4
Which component of blood is responsible for clotting and preventing excessive bleeding?
Platelets
ExplanationPlatelets are responsible for clotting and preventing excessive bleeding.
#5
What is the term for the contraction phase of the heart's pumping action?
Systole
ExplanationSystole is the contraction phase of the heart's pumping action.
#6
What is the primary function of red blood cells?
Transport oxygen
ExplanationRed blood cells primarily transport oxygen.
#7
Which chamber of the heart pumps oxygenated blood to the body?
Left ventricle
ExplanationThe left ventricle pumps oxygenated blood to the body.
#8
Which hormone is responsible for increasing heart rate and blood pressure during the 'fight or flight' response?
Adrenaline
ExplanationAdrenaline increases heart rate and blood pressure during 'fight or flight'.
#9
What is the medical term for a heart attack?
Myocardial infarction
ExplanationA heart attack is medically termed as myocardial infarction.
#10
Which blood type is known as the universal donor?
O
ExplanationBlood type O is known as the universal donor.
#11
What is the function of the pericardium?
Protect and lubricate the heart
ExplanationThe pericardium protects and lubricates the heart.
#12
What is the purpose of the valves in the heart?
Prevent backflow of blood
ExplanationValves in the heart prevent backflow of blood.
#13
What condition results from a blockage in the coronary arteries, reducing blood flow to the heart muscle?
Myocardial infarction
ExplanationA blockage in coronary arteries leads to myocardial infarction.
#14
Which blood vessels have the thinnest walls, allowing for the exchange of nutrients and gases with tissues?
Capillaries
ExplanationCapillaries have thin walls for nutrient and gas exchange with tissues.
#15
What is the term for the force exerted by blood against the walls of the arteries?
Blood pressure
ExplanationThe force exerted by blood against artery walls is termed as blood pressure.
#16
Which condition is characterized by an irregular and rapid heartbeat?
Atrial fibrillation
ExplanationAtrial fibrillation is characterized by irregular and rapid heartbeat.
#17
What is the primary function of the cardiovascular system?
Transport nutrients and oxygen
ExplanationThe cardiovascular system transports nutrients and oxygen.