The use of behavior-modifying drugs is the most effective way to treat behavior problems in animals
a. true
b. false
.B
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_____ kill bacteria via phagocytosis and digestion. The granules of these white blood cells produce a killing zone around them.
A) Neutrophils B) Basophils C) Cytotoxic T cells D) Natural killer cells E) Suppressor T cells
________ acts as a biological filter in organs like lymph nodes.
A. Areolar connective tissue B. Reticular tissue C. Dense regular connective tissue D. Dense irregular connective tissue
Which of the following is not true of hemoglobin?
A. It makes up about 1/3 of a red blood cell. B. Each hemoglobin molecule consists of 4 protein subunits. C. Each hemoglobin molecule can bind to up to 20 oxygen molecules at a time. D. Oxyhemoglobin is bright red, and deoxyhemoglobin is dark red. E. All of these are true of hemoglobin.
Most of the protein factors that are required for clotting are synthesized by
A) platelets. B) megakaryocytes. C) the liver. D) the kidneys. E) the spleen.