Chapter 18

Tiny cell fragments involved in blood clotting

platelets, thrombocytes

Most of the remaining 5% of the volume of the formed elements; are involved in immunity

white blood cells (WBC), leukocytes

Choose the correct statement regarding the function of platelets.

Platelets secrete procoagulants, or clotting factors, which promote blood clotting

Which of the following factors is the initial stimulus for the release of EPO?

a decrease in blood oxygen

Plasma contains _______ but serum does not.

fibrinogen

The red pigmented protein in erythrocytes that transports oxygen and carbon dioxide is called

hemoglobin

Platelets are formed from

pieces of the megakaryocyte breaking off

The cell fragments that are a component of blood are

platelets

The component of plasma least likely (under normal conditions) to be present in the same amount in interstitial fluid is

protein

About 95% of the volume of the formed elements; transport oxygen and carbon dioxide

red blood cells (RBC), erythrocytes

Damage to a blood vessel will cause a vessel spasm.

true

In the fetus, hematopoiesis can occur in the lymph nodes, liver, thymus, and spleen.

true