#1
Which blood vessels carry oxygenated blood away from the heart?
Arteries
ExplanationCarry oxygenated blood away from the heart.
#2
What is the average heart rate for a healthy adult at rest?
60-80 beats per minute
ExplanationAverage resting heart rate.
#3
What is the main function of the coronary arteries in the heart?
Supply oxygenated blood to the heart muscle
ExplanationSupply oxygenated blood to the heart.
#4
Which hormone is released in response to stress and increases blood sugar levels?
Cortisol
ExplanationReleased in response to stress.
#5
Which blood type is known as the universal recipient?
AB
ExplanationConsidered the universal recipient.
#6
What is the main function of red blood cells?
Transport oxygen
ExplanationTransport oxygen throughout the body.
#7
Which organ is responsible for producing insulin in the human body?
Pancreas
ExplanationProduces insulin.
#8
Which component of blood is responsible for clotting?
Platelets
ExplanationResponsible for blood clotting.
#9
In which chamber of the heart does oxygenated blood enter?
Left atrium
ExplanationOxygenated blood enters.
#10
Which blood component is responsible for carrying oxygen and carbon dioxide?
Red blood cells
ExplanationCarry oxygen and carbon dioxide.
#11
What is the function of the lymphatic system in the human body?
Filter and drain interstitial fluid
ExplanationFilters and drains interstitial fluid.
#12
Which blood type is considered the universal donor?
O
ExplanationConsidered the universal donor.
#13
What is the primary function of the spleen in the human body?
Blood filtration and storage of platelets
ExplanationFilters blood and stores platelets.
#14
Which immune cells are responsible for directly attacking and destroying infected cells?
Natural killer cells
ExplanationAttack and destroy infected cells.
#15
Which blood vessels have thin walls that allow for the exchange of nutrients and gases with tissues?
Capillaries
ExplanationAllow exchange of nutrients and gases.