A person who is stressed usually has increased
A) activity of the spleen and other lymphatic organs.
B) number of lymphocytes in the blood.
C) blood pressure.
D) resistance to infections.
C
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The hardest biologically manufactured substance is enamel.
Answer the following statement true (T) or false (F)
The best models to use in studying surface anatomy include
A) babies and children. B) elderly individuals. C) individuals with well-developed muscles and little body fat. D) extremely slender individuals who have little body fat. E) plastic models from the laboratory.
In prophase,
A. DNA is synthesized. B. the chromosomes replicate. C. the spindle fibers disappear. D. cytokinesis occurs. E. the chromosomes condense, shorten, and thicken.
An ________ is composed of two or more tissues types, whereas ________ are microscopic structures in a cell
A) organelle; molecules B) organ system; organs C) organ; molecules D) organ; organelles E) organ system; organelles