Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
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Textbook Question
Chapter 39, Problem 23CTQ
Explain how a puncture to the thoracic cavity (from a knife wound, for instance) could alter the ability to inhale.
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engineered constructs that consist of hollow fibers are acting as synthetic capillaries, around which cells have been loaded. The cellular space around a single fiber can be modeled as if it were a Krogh tissue cylinder. Each fiber has an outside “capillary” radius of 100 µm and the “tissue” radius can be taken as 200 µm. The following values apply to the device:R0 = 20 µM/secaO2 = 1.35 µM/mmHgDO2,T = 1.67 x 10-5 cm2/secPO2,m = 4 x 10-3 cm/secInstead of blood inside the fibers, the oxygen transport and tissue consumption are being investigated by usingan aqueous solution saturated with pure oxygen. As a result, there is no mass transfer resistance in the synthetic“capillary”, only that due to the membrane itself. Rather than accounting for pO2 variations along the length ofthe fiber, use an average value in the “capillary” of 130 mmHg.Is the tissue fully oxygenated?
Molecular Biology
Please help with question. thank you
You are studying the expression of the lac operon. You have isolated mutants as described below. In the presence of glucose, explain/describe what would happen, for each mutant, to the expression of the lac operon when you add lactose AND what would happen when the bacteria has used up all of the lactose (if the mutant is able to use lactose).5. Mutations in the lac operator that strengthen the binding of the lac repressor 200 fold
6. Mutations in the promoter that prevent binding of RNA polymerase
7. Mutations in CRP/CAP protein that prevent binding of cAMP8. Mutations in sigma factor that prevent binding of sigma to core RNA polymerase
Chapter 39 Solutions
Biology 2e
Ch. 39 - Figure 39.7 Which of the following statements...Ch. 39 - Figure 39.13 Which of the following statements is...Ch. 39 - Figure 39.20 The kidneys are responsible for...Ch. 39 - The respiratory system. provides body tissues with...Ch. 39 - Air is warmed and humidified in the nasal...Ch. 39 - Which is the order of airflow during inhalation?...Ch. 39 - The inspiratory reserve volume measures the...Ch. 39 - Of the following, which does not explain why the...Ch. 39 - The total lung capacity is calculated using which...Ch. 39 - How would paralysis of the diaphragm alter...
Ch. 39 - Restrictive airway diseases. increase the...Ch. 39 - Alveolar ventilation remains constant when...Ch. 39 - Which of the following will NOT facilitate the...Ch. 39 - The majority of carbon dioxide in the blood is...Ch. 39 - The majority of oxygen in the blood is transported...Ch. 39 - Describe the function of these terms and describe...Ch. 39 - How does the structure of alveoli maximize gas...Ch. 39 - What does FEV1/FVC measure? What factors may...Ch. 39 - What is the reason for having residual volume in...Ch. 39 - How can a decrease in the percent of oxygen in the...Ch. 39 - If a patient has increased resistance in his or...Ch. 39 - How would increased airway resistance affect...Ch. 39 - Explain how a puncture to the thoracic cavity...Ch. 39 - When someone is standing, gravity stretches the...Ch. 39 - What would happen if no carbonic anhydrase were...Ch. 39 - How does the administration of 100 percent oxygen...
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