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In a centrifuged blood sample, what forms the "buffy coat"?


A) White blood cells and platelets
B) Red blood cells
C) Plasma
D) All of the formed elements together

E) A) and D)
F) A) and C)

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What component of blood typically makes up about 45% of blood volume?


A) Red blood cells
B) White blood cells
C) Plasma
D) Platelets

E) C) and D)
F) All of the above

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During hematopoiesis, the __________ stem cells give rise to RBCs, platelets, and all but one type of WBC.


A) myeloid
B) lymphoid

C) A) and B)
D) undefined

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Patients with leukemia tend to have a deficiency in __________ and, thus, have a tendency to bleed.


A) vitamin K
B) red blood cells
C) platelets
D) leukocytes

E) C) and D)
F) B) and C)

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Mr. Jenkins saw his doctor because he had been feeling tired and listless. Blood tests revealed a low hematocrit. Mr. Jenkins has a condition called __________.


A) anemia
B) anoxia
C) polycythemia
D) hypoxia
E) leukemia

F) C) and D)
G) None of the above

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What antigens are found on RBCs of type O- blood?


A) Rh antigen only
B) A , B, and Rh antigens
C) No blood-grouping antigens
D) A and B antigens, but no Rh antigen

E) A) and C)
F) C) and D)

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