B-lymphocytes are
A. antibody-producing red blood cells.
B. immune system cells that are generated in the tonsils.
C. platelets that are generated in the thymus.
D. white blood cells that are generated in red bone marrow.
E. blood cells found only in people with type B blood.
Answer: D
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A. Large amount of tissue fluid to dissolve the gases B. Small surface area C. Simple squamous epithelium of the alveolus and capillaries D. Large groups of white blood cells in contact with the membrane
The first indication of a high degree of erythropoiesis is when reticulocytes make up more than ____ percent of the circulating red blood cells
a. 0.3 b. 0.5 c. 1.0 d. 1.5 e. 1.9
true or false? DNA replication can begin at any site along the DNA molecule.
a. true b. false
Lactose is a disaccharide found in milk. Individuals who are lactose intolerant lack the enzyme to break this sugar down into monosaccharides. Based on enzyme nomenclature, what enzyme is deficient in these individuals?
A. Lact ose B. Lact ese C. Lact ase D. Lacto gen