Biology
Biology
12th Edition
ISBN: 9780134813448
Author: Audesirk, Teresa, Gerald, Byers, Bruce E.
Publisher: Pearson,
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Chapter 34, Problem 3MC

Which of the following statements is False?

a. Gills may be used by molluscs.

b. Tracheoles carry air to insect body cells.

c. Parabronchi are found in the conducting portion of mammalian respiratory systems.

d. The human trachea branches to form two bronchi.

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Which of the following is a true statement? A. The concentration of oxygen in water is greater than that in air. B. In animals with gills, ventilation helps to reduce the thickness of the boundary layer. C. Countercurrent flow at the gas-exchange surface results in the diffusion gradient across surface. D. Mammalian lungs requires the diaphragm because the lungs are relatively stiff and filled with parabronchi.
Marine mammals are able to hold their breath for extended periods underwater because a. unlike humans, they don’t hypoventilate. b. partial pressure of carbon dioxide does not increase underwater. c. myoglobin in muscle tissue provides an oxygen reserve. d. the brains of marine mammals do not have receptors that respond to impulses initiated in the aortic and carotid bodies.
Which of the following is NOT a feature of a gas-exchange organ in animals? A. low surface area for gas exchange B. moist C. thin, delicate structure D. extensive blood flow

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