The term "primary lymphatic structure" applies
A. only to red bone marrow.
B. only to lymph nodes.
C. to lymph nodes and MALT.
D. to the red bone marrow and thymus.
E. to the spleen and lymph nodes.
Answer: D
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Which of the following statements regarding the thymus is FALSE?
A) It has follicles similar to those in the spleen. B) It does not directly fight antigens. C) It functions strictly in T lymphocyte maturation. D) Its stroma consists of epithelial tissue.
The wall of the left ventricle is thicker than the wall of the right ventricle because the
a. left ventricle must pump much more blood than the right ventricle so it must have stronger walls. b. right ventricle must pump much more blood than the left ventricle so it has a larger chamber to accommodate the blood and a correspondingly thinner wall. c. left ventricle must pump the same amount of blood into the high-resistance, high-pressure systemic system as does the right ventricle into the low-resistance, low-pressure pulmonary system. d. right ventricle must create higher tension within its walls. e. left ventricle must pump oxygenated blood, which requires more energy than pumping unoxygenated blood.
The ________ division tends to prepare the body for action
A) somatic motor B) motor afferent C) sensory afferent D) sympathetic E) parasympathetic
The intermediate stage of cellular respiration
A. produces pyruvate and occurs in the mitochondria. B. requires Coenzyme A and occurs in the cytosol. C. produces ATP and occurs in the cytosol. D. produces carbon dioxide and occurs in the mitochondria.