BIO 734 Exam 4 - BIO 734 Exam 4 (Spring 2010) 1. The...

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BIO 734 – Exam 4 (Spring 2010) 1. The conducting zone contains all of the following EXCEPT A. the primary bronchi. B. the larynx. C. the terminal bronchioles. D. the respiratory bronchioles. 2. Diffusion rate across the respiratory membrane is rapid because A. there are about 750 square feet of alveoli membrane. B. alveoli are one cell thick. C. the air-blood barrier is two cells thick. D. All of the choices are correct. 3. Intrapleural pressure __________ during expiration. A. increases B. decreases C. remains unchanged 4. Respiratory Distress Syndrome (RDS) is a condition associated with premature babies who lack A. a-antitrypsin. B. histamine. C. type I alveolar cells. D. surfactant. 5. Which muscle's contraction will stimulate inspiration? A. diaphragm B. external intercostals C. parasternal intercostals D. All of the choices are correct. 6. Which of the following is true? A. Blood in the pulmonary veins is low in oxygen. B. Blood in the pulmonary veins is high in carbon dioxide. C. The oxygen concentration of inspired air is higher than that of alveolar air. D. All of the choices are true. 7. The volume of gas inspired or expired in a quiet respiration cycle is the A. tidal volume. B. vital capacity. C. inspiratory reserve volume. D. residual volume.
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8. The volume of gas remaining in the lungs after a maximum expiration is the A. tidal volume. B. vital capacity. C. inspiratory reserve volume. D. residual volume. 9. The amount of a given gas dissolved in the blood A. is directly proportional to the solubility partial pressure of the gas. B. increases at higher altitudes. C. is described primarily by Boyle's law. D. All of the choices are correct. 10. Who's law states that the amount of gas dissolved in a liquid is directly proportional to the partial pressure of the gas? A. Charles law B. Boyle's law C. Henry's law D. Laplace's law 11. Normal arterial P O2 is A. 40 mm Hg. B. 46 mm Hg. C. 85 mm Hg. D. 100 mm Hg. 12. Normal venous P O2 is A. 40 mm Hg. B. 46 mm Hg. C. 85 mm Hg. D. 100 mm Hg. 13. Decompression sickness is caused by ascending to sea level too quickly which results in bubbles of _____ to form in the blood. A. oxygen B. carbon dioxide C. carbon monoxide D. nitrogen 14. Peripheral chemoreceptors that can detect changes in blood pH are located in the A. medulla oblongata. B. aortic and carotid bodies. C. pons. D. lungs. 15. Central chemoreceptors in the medulla oblongata directly detect changes in the pH of the A. blood. B. cerebrospinal fluid. C. lymph. D. air.
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16. The primary drive to breath is elicited by which of the following: A. reduced P O2 . B. reduced P CO2 . C. increased P O2 . D. increased P CO2 . 17. What is the condition of having low blood oxygen levels? A. hypocapnia
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BIO 734 Exam 4 - BIO 734 Exam 4 (Spring 2010) 1. The...

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