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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Most 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 plasma
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.
mammals do not normally ventilate the lungs at a high enough rate.
C.
the trachea and bronchi are too small in volume to contain this amount of O2.
D.
mammal lungs have too many alveoli to ventilate.
E.
some O2 has been exchanged with the blood before reaching the alveoli.
Which of the following situations occurs if a person's blood becomes more alkaline?
A.
Hemoglobin molecules retain less oxygen per heme group under alkaline conditions than they do at neutral pH or under acidic conditions.
B.
Hemoglobin molecules give up oxygen more readily under alkaline conditions than they do under neutral pH or under acidic conditions.
C.
Hemoglobin molecules change shape and begin to lose oxygen molecules.
D.
Hemoglobin molecules retain oxygen more readily under alkaline conditions than they do at neutral pH or under acidic conditions.
E.
There is no change in hemoglobin's oxygen-binding affinity under alkaline conditions when compared to blood at neutral pH or under acidic conditions.
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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- In human lungs, gas exchange occurs at the______ . a. bronchi c. alveoli b. bronchioles d. pleural sacsarrow_forwardProtons influence the binding affinity of oxygen to hemoglobin. Based on the oxygen-transport mechanism of hemoglobin, which of the following is correct? A. The pH value of lung is lower than that of tissue B. Protons compete with oxygen C. Protons will facilitate oxygen release in lung D. Production of lactate during exercise will accelerate oxygen delivery.arrow_forwardwhich of the following processes causes most of the carbon dioxide from the blood to move into the alveoli? a. passive transport using a carrier proteins b. active transport using energy c. conversion to carbon dioxide d. diffusion down a concentration gradientarrow_forward
- Which of the following is NOT a way that carbon dioxide exits the body? * A. carbon dioxide travels down the concentration gradient and is able to diffuse from the tissues directly out of the body through its pores. B. carbon dioxide dissolves directly into the blood plasma to be carried to the lungs where it will be exhaled. C. Carbon dioxide binds with hemoglobin as red blood cell pass through tissues and is released as the blood cells reached the lungs. D. carbon dioxide converts into bicarbonate ions in the blood as it diffuses from the tissues and converts back to carbon dioxide as it reaches the lungs to be exhaled PLS ANSWWER ASP THANK YOUU SO MUCHarrow_forwardVentilation of alveoli above the needs of metabolism tends to A. Increase the hydrogen ion concentration in the blood B. Increase the carbon dioxide concentration in the blood C. Leads to respiratory acidosis D. Decrease the carbon dioxide concentration in the blood E. Decrease the pH of the bloodarrow_forwardDuring respiration, oxygen is inhaled through the airways into the alveoli where gas exchange occurs. For each condition described below, state if the flux of oxygen through the blood gas barrier into the pulmonary capillaries increases or decreases. Use Fick’s law to justify your answer. a. Climbing to the top of Mt. Everest b. More abundant but smaller alveoli c. Extreme increase in pulmonary capillary pressure d. Pulmonary fibrosisarrow_forward
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