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. During acute alveolar hyperventilation, the blood 1. increases 2. decreases 3. increases 4. pH decreases A. 2 only B. 4 only C. 1 and 3 only D. 2 and 4 onlyarrow_forward6. During a normal exhalation, the 1. intra-alveolar pressure is greater than the atmospheric pressure. 2. pleural pressure is less than the atmospheric pressure. 3. intra-alveolar pressure is in equilibrium with the atmospheric pressure. 4. pleural pressure progressiverly decreases. A. 1 only B. 4 only C. 1 and 2 only D. 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_forward
- 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_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_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_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_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
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