Carbohydrate groups on the surfaces of erythrocytes determine blood type and are known as:
A) antigens. B) tissue factors. C) antibodies. D) agglutinins.
Answer: A
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What could be a possible cause of bile pigments in the urine?
A) diabetes mellitus B) kidney infection C) hypertension D) kidney stones E) liver disease
A sperm count any lower than ________ million sperm per mL of semen is usually associated with infertility (sterility).
A. 200 to 250 B. 100 to 200 C. 250 to 500 D. 50 to 100 E. 20 to 25
Which of these is an example of an EPSP in a typical neuron?
A. A voltage change from 0 mV to +0.35 mV B. A voltage change from +35 mV to 0 mV C. A voltage change from -70 mV to -70.5 mV D. A voltage change from -69.5 mV to -70 mV E. A voltage change from -70 mV to -69.5 mV
Which of the following statements regarding the lymphoid organs is NOT true?
A. The primary lymphoid organs are the bone marrow and thymus. B. The thymus secretes protein hormones, collectively called thymopoietins. C. Large numbers of macrophages and lymphocytes are found in the lymph nodes and spleen. D. The tonsils contain lymphocytes, macrophages, and dendritic cells that respond to microbes in food. E. Once a lymphocyte reaches a secondary lymphoid organ, it remains there for its lifetime.