LooseLeaf for Human Anatomy
5th Edition
ISBN: 9781259285271
Author: Michael McKinley Dr., Valerie O'Loughlin, Elizabeth Pennefather-O'Brien
Publisher: McGraw-Hill Education
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Chapter 25, Problem 4WYL
What is the function of the nasal conchae?
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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?
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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
Molecular Biology
Please help and there is an attached image. Thank you.
A bacteria has a gene whose protein/enzyme product is involved with the synthesis of a lipid necessary for the synthesis of the cell membrane. Expression of this gene requires the binding of a protein (called ACT) to a control sequence (called INC) next to the promoter.
A. Is the expression/regulation of this gene an example of induction or repression?Please explain:B. Is this expression/regulation an example of positive or negative control?C. When the lipid is supplied in the media, the expression of the enzyme is turned off.Describe one likely mechanism for how this “turn off” is accomplished.
Chapter 25 Solutions
LooseLeaf for Human Anatomy
Ch. 25 - Explain the functions carried out by the...Ch. 25 - Prob. 2WYLCh. 25 - What changes occur in inhaled gases as they travel...Ch. 25 - What is the function of the nasal conchae?Ch. 25 - How is swallowed food prevented from entering the...Ch. 25 - Prob. 6WYLCh. 25 - Prob. 7WYLCh. 25 - How do terminal and respiratory bronchioles differ...Ch. 25 - Prob. 9WYLCh. 25 - What is pulmonary ventilation?
Ch. 25 - Prob. 11WYLCh. 25 - Prob. 12WYLCh. 25 - Prob. 13WYLCh. 25 - Prob. 14WYLCh. 25 - Match each numbered item with the most closely...Ch. 25 - The visceral pleura covers the a. outer surface of...Ch. 25 - Prob. 2MCCh. 25 - Prob. 3MCCh. 25 - Which structure is the last, smallest portion of...Ch. 25 - Which is not a function of the paranasal sinuses?...Ch. 25 - Prob. 6MCCh. 25 - The C-shaped cartilages in the trachea a. serve as...Ch. 25 - Which of the following is not a muscle of...Ch. 25 - The epithelium lining the alveolus is composed of...Ch. 25 - The apneustic center is involved in a. inhibition...Ch. 25 - What is the function of the mucous lining of the...Ch. 25 - Prob. 2CRCh. 25 - Prob. 3CRCh. 25 - What are the components of the bronchial tree,...Ch. 25 - Prob. 5CRCh. 25 - Prob. 6CRCh. 25 - How do the left and right lungs differ...Ch. 25 - Prob. 8CRCh. 25 - Name the autonomic nervous system respiratory...Ch. 25 - Prob. 10CRCh. 25 - Prob. 1DCRCh. 25 - Your best friend George is an athletic 20-year-old...
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