Cardiopulmonary Anatomy & Physiology
7th Edition
ISBN: 9781337794909
Author: Des Jardins, Terry.
Publisher: Cengage Learning,
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Chapter 6, Problem 3RQ
Summary Introduction
Introduction:
Pulmonary shunting is a condition in which alveoli are perfused with the normal amount of blood but the oxygen does not reach the alveoli of the lungs, and hence, enough ventilation do not occur. This means the ventilation to perfusion ratio is zero. Pulmonary shunting could be due to absolute shunts (anatomical) or pathological shunts (congenital defects, pulmonary oedema etc.). This leads to venous admixture i.e. non-oxygenated blood gets shunted distal to alveoli and mixes with the oxygenated blood.
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Cardiopulmonary Anatomy & Physiology
Ch. 6 - Prob. 1RQCh. 6 - Prob. 2RQCh. 6 - Prob. 3RQCh. 6 - Prob. 4RQCh. 6 - The normal calculated anatomic shunt is about A....Ch. 6 - 6. In which of the following types of hypoxia is...Ch. 6 - 7. If a patient normally has a 12 g/dL Hb,...Ch. 6 - Prob. 8RQCh. 6 - Assuming everything else remains the same, when an...Ch. 6 - 10. Under normal conditions, the is about
A. 10...
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- 3. In the normal individual in the upright position 1. the negative pleural pressure is greater (i. e., more negative) in the upper lung regions. 2. the alveoli in the lower lung regions are larger than the alveoli in the upper lung regions. 3. ventilation is more effective in the lower lung regions. 4. the pleural pressure is always below atmospheric pressure during a normal ventilator cycle. A. 1 and 2 only B. 2 and 3 only C. 2,3 and 4 only D. 1,3, and 4 onlyarrow_forward1. During acute alveolar hypoventilation, the blood 1. increases 2. pH increases 3. increases 4. increases A. 2 only B. 4 only C. 2 and 3 only D. 1,3, and 4 onlyarrow_forwardNormally, the airway resistance in the tracheobronchial tree is about A. 0.5-1.5 cm H2O/L/sec. B. 1.0-2.0 cm H2O/L/sec. C. 2.0-3.0 cm H2O/L/sec. D. 3.0-4.0 cm H2O/L/sec.arrow_forward
- Case 1 As a result of the severe left heart failure and increased pulmonary blood pressure in the case, fluid moved out of the pulmonary capillaries and into the extracapillary spaces. The pathologic process caused the thickness of the alveolar-capillary membrane to______arrow_forward3. At birth, the number of alveoli represents; about how much of the total adult gas exchange units? A. 10 percent B. 20 percent C. 30 percent D. 40 percentarrow_forwardSuppression of the peripheral chemoreceptors begins when the Po2 falls below A. 50 mm Hg B. 40 mm Hg C. 30 mm Hg D. 20 mm Hgarrow_forward
- Under normal resting conditions, the diffusion of oxygen and carbon dioxide is usually completed in about 1. 0.25 second 2. 0.50 second 3. 0.75 second 4. 1.0 second 5. one-third of the time available: A. 2 only B. 3 only C. 4 and 5 only D. 1 and 5 onlyarrow_forwardThe mean intraluminal pressure in the pulmonary capillaries is A. 5 mm Hg B. 10 mm Hg C. 15 mm Hg D. 20 mm Hgarrow_forwardAccording to Ficks law, gas diffusion is 1. Directly proportional to the thickness of the tissue 2. Indirectly proportional to the diffusion constants 3. Directly proportional to the difference in partial pressure of the gas between the two sides 4. Indirectly proportional to the tissue area A. 1 only B. 3 only C. 4 only D. 2 and 3 onlyarrow_forward
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