31) The unusual shape of the erythrocyte can be explained by which of the following?
A) It is the best shape for a cell that must pass through narrow capillaries.
B) It allows each cell to hold a maximum amount of hemoglobin.
C) It increases surface area for respiratory exchange across the plasma membrane.
D) It reflects the fact that erythrocytes are degenerating.
32) The most abundant white blood cell type is the
A) neutrophil.
B) monocyte.
C) eosinophil.
D) lymphocyte.
33) What is the anatomical difference between T lymphocytes and B lymphocytes?
A) T cells are larger.
B) B cells are larger.
C) B cells have a darker-staining nucleus.
D) They are structurally identical.
34) Which of the following is
not
phagocytic?
A) lymphocyte
B) neutrophil
C) eosinophil
D) basophil
35) Which cells fight infection by producing antibodies?
A) T lymphocytes
B) B lymphocytes
C) plasma cells
D) eosinophils
36) What type of white blood cell increases dramatically during parasitic infections or allergic reactions?
A) neutrophil
B) monocyte
C) basophil
D) eosinophil
37) Which of the following organs does
not
form blood cells in the fetus?
A) liver
B) lung
C) spleen
D) yolk sac
38) Which white blood cells contain granules of histamine?
A) eosinophils
B) basophils
C) neutrophils
D) lymphocytes
39) The functions of platelets include all of the following
except
A) secretion of chemicals that call more platelets to the site of injury.
B) formation of a temporary patch in the walls of damaged blood vessels.
C) release of chemical signals that trigger the immune response.
D) release of molecules that initiate clotting.
40) What is the difference between a thrombus and an embolus?
A) One occurs in the bloodstream, whereas the other occurs outside the bloodstream.
B) One occurs in arteries, the other in veins.
C) One is a blood clot, whereas the other is a parasitic worm.
D) A thrombus must travel to become an embolus.