Biology: The Unity and Diversity of Life (MindTap Course List)
15th Edition
ISBN: 9781337408332
Author: Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Publisher: Cengage Learning
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Textbook Question
Chapter 38, Problem 10SQ
At high altitudes, _______.
- a. nitrogen bubbles out of the blood
- b. hemoglobin has fewer oxygen-binding sites
- c. there are fewer O2 molecules per unit volume of air than at low altitudes
- d. there is more carbon monoxide than at sea level
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The trachea has rings of cartilage to:
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The alveoli of mammalian lungs do not contain 20.9% O2 (that is, the percentage of O2 in atmospheric dry air) because
A.
there is dead space in the trachea and bronchial tree and the air in the lungs is humidified.
B.
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the trachea and bronchi are too small in volume to contain this amount of O2.
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mammal lungs have too many alveoli to ventilate.
E.
some O2 has been exchanged with the blood before reaching the alveoli.
With rare exceptions, the majority of oxygen is transported in the bloodof vertebratesa. by binding to plasma proteins.b. by binding to hemoglobin in erythrocytes.c. as dissolved gas in the plasma.d. as dissolved gas in the cytoplasm in the erythrocytes.e. by binding to myoglobin.
Chapter 38 Solutions
Biology: The Unity and Diversity of Life (MindTap Course List)
Ch. 38 - Prob. 1DAACh. 38 - Smoking and Lung Function Data from the Coronary...Ch. 38 - Smoking and Lung Function Data from the Coronary...Ch. 38 - The respiratory protein hemocyanin _______. a....Ch. 38 - In a _______, air flows continually across the...Ch. 38 - Prob. 3SQCh. 38 - In human lungs, gas exchange occurs at the ______....Ch. 38 - Which holds the most dissolved oxygen? a. warm,...Ch. 38 - When you breathe quietly, inhalation is _______...Ch. 38 - During inhalation _______. a. the thoracic cavity...
Ch. 38 - Prob. 8SQCh. 38 - Most oxygen transported in human blood _______. a....Ch. 38 - At high altitudes, _______. a. nitrogen bubbles...Ch. 38 - Countercurrent flow allows _______ to maximize...Ch. 38 - ______ in arteries sense changes in the acidity of...Ch. 38 - Vital capacity is the _______. a. amount of...Ch. 38 - Prob. 14SQCh. 38 - Match the words with their descriptions. ____...Ch. 38 - Prob. 1CTCh. 38 - Prob. 2CTCh. 38 - Icefish live in the extremely cold ocean near...
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- During inhalation, ________. a. the thoracic cavity expands d. the diaphragm relaxes c. atmospheric pressure declines d. the lungs deflatearrow_forwardThe respiratory system_______. a. provides body tissues with oxygen b. provides body tissues with oxygen and carbon dioxide c. establishes how many breaths are taken per minute d. provides the body with carbon dioxidearrow_forwardFigure 16.9 Which of the following statements about the human respiratory system is false? a. When we breathe in, air travels from the pharynx to the trachea. b. The bronchioles branch into bronchi. c. Alveolar ducts connect to alveolar sacs. d. Gas exchange between the lungs and blood takes place in the alveolus.arrow_forward
- In______, gas exchange occurs at the body surface and gas is distributed by diffusion alone. a. earthworm c. frogs b. flatworms d. insectsarrow_forwardMost oxygen transported in human blood______ . a. is bound to hemoglobin b. combines with carbon to form carbon dioxide c. is in the form of bicarbonate d. is dissolved in the plasmaarrow_forwardWhy do men typically have a greater lung capacity than women of equal size? a. They have larger lungs b. Men breathe more deeply than womenarrow_forward
- Mountain climbers may have difficulty at high elevations becausea. the partial pressure of oxygen is lower at higher elevations.b. more CO2 occurs at higher altitudes.c. the concentration of all elements of the air is lower at higher elevations.d. cooler temperatures restrict the metabolic activity of oxygen at high elevations.arrow_forwardThe partial pressure of carbon dioxide is 45 mm Hg inthe blood and 40 mm Hg in the alveoli. What happens tothe carbon dioxide?a. It diffuses into the blood.b. It diffuses into the alveoli.c. The gradient is too small for carbon dioxide todiffuse.d. It decomposes into carbon and oxygenarrow_forwardIn human lungs, gas exchange occurs at the______ . a. bronchi c. alveoli b. bronchioles d. pleural sacsarrow_forward
- Pulmonary edema can occur at high altitude this is happening because a. Of the swelling of the brain b. Of the leakage of fluid out of capillaries in the lung c. The blood pressure has dropped to low d. Of the shortage of breatharrow_forwardSome deep diving mammal compress their lungs to remove air. What is FALSE about this situation? A. Some whales have ribs with joints that help the compression. B. Removing air from lungs prevents lethal nitrogen bubbles (the bends). C. The animals store 02 in their blood and muscles during dives D. The air goes from their lungs into tiny spaces within their bones. Which is biggest? A. hemoglobin B. iron C. hemearrow_forwardThe rate of diffusion would increase by? A) an increase in airway resistance B) a decrease in lung compliance C) a decrease in alveolar surface area D) a decrease in alveolar barrier thicknessarrow_forward
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