What changes in the blood levels of respiratory gases result from hyperventilation?
A. Oxygen and carbon dioxide levels fall.
B. Oxygen levels do not change but carbon dioxide levels fall.
C. Oxygen levels rise and carbon dioxide levels fall.
D. Oxygen and carbon dioxide levels rise.
Answer: B
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The membrane that lines the walls of the abdominal and pelvic cavities is called the:
A) parietal peritoneum B) visceral peritoneum C) parietal pericardium D) visceral pericardium
The hypothalamic-hypophyseal portal system is a special blood supply that provides a connection between the hypothalamus and the pituitary gland.
a. true b. false
What type of cells break down bone tissue?
A. mast cells B. stem cells C. osteoclast D. macrophages E. adipocytes
A cleft lip results when
A. the two halves of the secondary palate do not fuse. B. the frontonasal and maxillary processes do not fuse. C. the lateral edges of the nasal placodes do not fuse with the maxillary processes. D. the maxillary processes do not fuse with the mandibular processes. E. None of these choices is correct.