41) Yellow bone marrow gets its color from
A) the bone trabeculae in the center of this colorless marrow.
B) the early stages of red blood cells being made there.
C) low densities of red blood cells.
D) fat cells.
42) Diapedesis is
A) the process by which eosinophils attack worms.
B) the ingestion of bacteria by macrophages.
C) the exit of leukocytes from capillaries.
D) amoeboid motion.
43) An average female has approximately ________ of blood.
A) 0.5 liter
B) 1 liter
C) 4 liters
D) 8 liters
44) When centrifuged, blood separates into the following sequence of layers, from lightest to heaviest:
A) buffy coat, hematocrit, plasma.
B) buffy coat, plasma, hematocrit.
C) hematocrit, plasma, buffy coat.
D) plasma, buffy coat, hematocrit.
45) In adults, blood cells are manufactured in the marrow of all of the following bones
except
the
A) pelvis.
B) forearm bones (radius and ulna).
C) clavicle.
D) sternum.
46) Which of the following statements concerning the various leukocytes is
false?
A) All perform diapedesis.
B) All are active in connective tissues but not in blood.
C) All fight disease.
D) All have distorted, lobed nuclei.
47) The precursors of neutrophils, listed in their proper order from the least to the most differentiated cells, are:
A) band cell, myeloblast, and myelocyte.
B) metamyelocyte, myeloblast, and neutrophil.
C) myeloblast, metamyelocyte, and band cell.
D) metamyelocyte, neutrophil, and band cell.
48) The blood's globulins include
A) albumin.
B) antibodies.
C) fibrinogen.
D) hemoglobin.
49) T cells function to
A) produce antibodies.
B) destroy body cells infected with viruses.
C) respond primarily to bacteria and bacterial toxins in body fluids.
D) phagocytize antigen-antibody complexes.
50) Leukocytes, ordered from most to least abundant, are the
A) basophils, eosinophils, lymphocytes, monocytes, and neutrophils.
B) basophils, eosinophils, monocytes, lymphocytes, and neutrophils.
C) neutrophils, lymphocytes, monocytes, eosinophils, and basophils.
D) neutrophils, monocytes, eosinophils, basophils, and lymphocytes.