Exploring the Components and Functions of Blood

What is the frequency of blood transfusion needs in the U.S.?

• Every 2 seconds

• Every 5 minutes

• Every 10 minutes

• Every 30 seconds

What percentage of your body weight does blood account for?

• About 12%

• About 5%

• About 15%

• About 8%

During a blood donation, what is the typical volume of blood taken from a donor?

• About two pints

• Half a pint

• About a pint

• Three pints

Which component of blood is primarily responsible for carrying oxygen?

• Platelets

• White blood cells

• Red blood cells

• Plasma

What is the main function of white blood cells?

• Clotting blood

• Carrying oxygen

• Defending the body against infection

• Regulating body temperature

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What is the primary fluid component of blood?

• Red blood cells

• White blood cells

• Platelets

• Plasma

What triggers the initial constriction of a blood vessel following an injury?

• The decrease in blood pressure

• The rupture of the blood vessel

• The activation of platelets

• The exposure of collagen fibers

What is the role of fibrin in the blood clotting process?

• It forms a mesh that traps blood cells and platelets

• It fights infection

• It dilutes the blood to prevent clotting

• It transports oxygen

Which blood type is known as the universal donor?

• Type AB

• Type O

• Type A

• Type B

What does the presence of Rh antigens indicate about a person's blood type?

• Rh positive

• Rh negative

• AB positive

• O negative