Concept explainers
Introduction:
A high amount of oxygen is required during heavy exercise for body cells and organs to function properly. Heavy exercise causes the blood pressure to increase. This provides the strength to the muscles and also improves the pumping ability of the blood by the heart to lungs and other body parts.
Answer to Problem 1RQ
Correct answer:
20 fold.
Explanation of Solution
Explanation for the correct answer:
Option (b) is, ‘20 fold’. The cardiopulmonary system’s components may get stressed to their limits during heavy exercise. The alveolar ventilation increases 20 fold along with oxygen diffusion capacity, blood flow in muscles, consumption of oxygen, and production of heat. Hence, option (b) is correct.
Explanation for the incorrect answer:
Option (a) is, ‘10 fol0d’. The alveolar ventilation increase is coupled with oxygen diffusion capacity, muscle blood flow, oxygen consumption, and heat production. The value of alveolar ventilation increases 20 fold. So, it is an incorrect option.
Option (c) is, ‘30 fold’. The amount of gas exchange in an adult is 6 L (liters)/ min during normal quiet breathing. The alveolar ventilation increases 20 fold during strenuous exercise. So, it is an incorrect option.
Option (d) is, ‘40 fold’. The strenuous exercise increases the alveolar ventilation 20 fold. So, it is an incorrect option.
Hence, options (a), (c), and (d) are incorrect.
Therefore, it can be concluded that the alveolar ventilation increases 20 fold during heavy exercise. An adult interchanges approximately 6 L of the gas per minute during the normal quiet breathing.
Want to see more full solutions like this?
Chapter 18 Solutions
Cardiopulmonary Anatomy & Physiology
- The residual volume/total lung capacity ratio in healthy men ages 20 to 30 years is A. 15% B. 20% C. 25% D. 30%arrow_forward4. The number of alveoli continues to increase until about A. 6 years of age B. 8 years of age C. 10 years of age D. 12 years of agearrow_forwardMost of the lung function indices reach their maximum levels betwee A. 5-10 years of age B. 10-15 years of age C. 15-20 years of age D. 20-25 years of agearrow_forward
- Assuming that pressure remains constant if the radius of a bronchial airway through which gas flows at a rate of 400 l/min is reduced to one half of its original size the flow through the bronchial airway would change to A.10L/min. B.25L/min. C.100L/min. D.200L/min.arrow_forwardGoals of oxygen therapy include all of the following except: A. Increasing alveolar and blood levels of oxygen B. Decrease overall cardiopulmonary workload C. Enable alveoli to open and stay open D. Decrease dyspnea in patient with COPD and lung diseasearrow_forwardThe maximum alveolar ventilation generated during heavy exercise under normal conditions is about what percent of the maximum voluntary ventilation? A. 20-35 percent B. 30-45 percent C. 40-55 percent D. 50-65 percentarrow_forward
- If the radius of a bronchial airway, which has a driving pressure of 2 mm Hg, is reduced by 16 percent of its original size, what will be the new driving pressure required to maintain the same gas flow through the bronchial airway? A. 4 mm Hg B. 8 mm Hg C. 12 mm Hg D. 16 mm Hgarrow_forwardWhen alveolar ventilation is 7 L/min and the pulmonary blood flow is 9.5 L/min, the V/Q ratio is about A. 0.4 B. 0.5 C. 0.6 D. 0.7arrow_forwardIf a patient is receiving an Flo2 of 0.60 on a day when the barometric pressure is 725 mm Hg, and if the PAco2 is 50 mm Hg, what is the patient's alveolar oxygen tension (PAo2)? A. 177 mm Hg C. 344 mm Hg B. 233 mm Hg D. 415 mm Hgarrow_forward
- When the diaphragm ascends, the volume of the lungs increases. a. True O b. Falsearrow_forwardIn an adult patient you are treating, you notice decreased lung compliance, decreased tidal volume and an increase in minute ventilation (frequency of breathing). One possible diagnosis for this patient is.... A. Anemia B. Pulmonary fibrosis C. Emphysema D. Respiratory distress syndrome E. Chronic obstructive pulmonary diseasearrow_forwardOxygen travels in the blood in order to reach cells in need of oxygenation. The amount of O2 that travels dissolved in the plasma and not attached onto hemoglobin is approximately a. 98% b. 7% C. 35% d. 2%arrow_forward
- Cardiopulmonary Anatomy & PhysiologyBiologyISBN:9781337794909Author:Des Jardins, Terry.Publisher:Cengage Learning,Basic Clinical Lab Competencies for Respiratory C...NursingISBN:9781285244662Author:WhitePublisher:CengageEssentials of Pharmacology for Health ProfessionsNursingISBN:9781305441620Author:WOODROWPublisher:Cengage