A young boy (10 years old) exhibited the following symptoms: advanced development of secondary sexual characteristics and rapid growth. Which of the following likely caused his condition?
A. Hyposecretion of estrogen
B. Hypersecretion of growth hormone
C. Hypersecretion of estrogen
D. Hypersecretion of vitamin D
E. Hypersecretion of testosterone
Answer: E
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Which of the following compounds are endocrine disruptors?
A) Tributyltin, polychlorinated biphenyls, tyramine, and anabolic steroids B) Polychlorinated biphynels and tyramine C) Anabolic steroids, tributyltin, and polychlorinated biphenyls D) Anabolic steroids, polychlorinated biphenyls, and tyramine
Which of the following is a buffer zone between the outside world and most of the cells of the body?
A) lymph B) extracellular fluid C) blood D) lumen E) All of the answers are correct.
B) oxygen levels in the blood decrease.
A) erythropoiesis. B) erythrocytosis. C) hemocytosis. D) hematopenia. E) erythropenia.
Erythrocytes transport oxygen and ________
A) transport some carbon dioxide B) defend the body against pathogens C) initiate blood clotting D) regulate erythropoiesis E) transport nutrients