Why does surgical removal of the spleen cause people to have an increased platelet count?
a. The bone marrow makes more platelets when the person has no spleen.
b. The 30% of platelets normally stored in the spleen are freely circulating.
c. Antibodies produced after splenectomy attack platelets.
d. Surgery stimulates platelet growth factors.
ANS: B
Normally, about 30% of the total platelet count is stored or sequestered in the spleen. When the spleen is removed (splenectomy), the platelet count will temporarily increase until the bone marrow adjusts its production of platelets to reestablish an essentially reference range platelet count.
You might also like to view...
All of the following are physical barriers EXCEPT:
a. skin b. antibodies c. eye membranes d. respiratory membranes
The Modified Puls Method method of reservoir routing relies on the so-called ____________________, which is a statement of conservation of the mass of water entering and leaving the reservoir or impoundment.
Fill in the blank(s) with the appropriate word(s).
Capillary blood collection tubes that contain heparin (to prevent clotting) are identified by a red mark.
Answer the following statement true (T) or false (F)
Some biological products must be protected from exposure to light.
a. true b. false