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Questions and Answers
What is the main effect of exercise on the metabolism of working muscles?
What is the main effect of exercise on the metabolism of working muscles?
- Decreases oxygen demand
- Reduces carbon dioxide production
- Increases oxygen demand (correct)
- Reduces lactic acid production
What is a common physiological response of the respiratory system during moderate to severe levels of exercise?
What is a common physiological response of the respiratory system during moderate to severe levels of exercise?
- Reduced removal of carbon dioxide
- Decreased lactic acid production
- Increased lactic acid production (correct)
- Increased oxygen consumption
How do the respiratory and cardiovascular systems respond to the stress caused by exercise?
How do the respiratory and cardiovascular systems respond to the stress caused by exercise?
- Increase oxygen supply to exercising tissues (correct)
- Decrease heart rate during exercise
- Reduce removal of carbon dioxide from the body
- Supply less oxygen to exercising tissues
What is a common physiological response of the respiratory system to ascent to altitude?
What is a common physiological response of the respiratory system to ascent to altitude?
What is acclimatization in the context of high-altitude residence?
What is acclimatization in the context of high-altitude residence?
What do diving and exercise have in common in relation to the respiratory system?
What do diving and exercise have in common in relation to the respiratory system?
How does long-term exercise affect the respiratory system according to the text?
How does long-term exercise affect the respiratory system according to the text?
What happens to lactic acid production during moderate to severe levels of exercise?
What happens to lactic acid production during moderate to severe levels of exercise?
What is a primary demand on the respiratory system during exercise?
What is a primary demand on the respiratory system during exercise?
During exercise, why does the work of breathing increase according to the text?
During exercise, why does the work of breathing increase according to the text?
How does active expiration during exercise affect the work of breathing?
How does active expiration during exercise affect the work of breathing?
What happens to minute ventilations above about 40 L/min during exercise?
What happens to minute ventilations above about 40 L/min during exercise?
Why is inspiratory work increased during exercise?
Why is inspiratory work increased during exercise?
What role do airflow rates play in the resistive work of breathing during exercise?
What role do airflow rates play in the resistive work of breathing during exercise?
How does increased tidal volume affect the work of breathing during exercise?
How does increased tidal volume affect the work of breathing during exercise?
During strenuous exercise, the increase in tidal volume mainly occurs at the expense of which lung volume?
During strenuous exercise, the increase in tidal volume mainly occurs at the expense of which lung volume?
What is the primary limiting factor for exercise in healthy people according to the text?
What is the primary limiting factor for exercise in healthy people according to the text?
During exercise, what contributes to the increase in cardiac output along with an increase in heart rate?
During exercise, what contributes to the increase in cardiac output along with an increase in heart rate?
What happens to arterial PCO2 during strenuous exercise?
What happens to arterial PCO2 during strenuous exercise?
What effect do deeper tidal volumes and active expirations during exercise have on pulmonary vascular resistance?
What effect do deeper tidal volumes and active expirations during exercise have on pulmonary vascular resistance?
What might be slightly elevated during strenuous exercise due to an increase in central blood volume?
What might be slightly elevated during strenuous exercise due to an increase in central blood volume?
At what range does the breathing frequency increase in healthy adults during strenuous exercise?
At what range does the breathing frequency increase in healthy adults during strenuous exercise?
What may result in greater ventilation of upper parts of the lung during expiration?
What may result in greater ventilation of upper parts of the lung during expiration?
During active expiration, what should be done to the extraalveolar vessels?
During active expiration, what should be done to the extraalveolar vessels?
What is the main reason for the increase in ventilation-perfusion ratios during moderate to severe exercise?
What is the main reason for the increase in ventilation-perfusion ratios during moderate to severe exercise?
What effect does increased pulmonary artery pressure have on the ventilation-perfusion ratio during exercise?
What effect does increased pulmonary artery pressure have on the ventilation-perfusion ratio during exercise?
What is one potential cause for the decrease in arterial PO2 during severe exercise?
What is one potential cause for the decrease in arterial PO2 during severe exercise?
What contributes to the increased (A-a)DO2 in severe exercise?
What contributes to the increased (A-a)DO2 in severe exercise?
What does the reduced 'scatter' of ventilation-perfusion ratios during exercise suggest?
What does the reduced 'scatter' of ventilation-perfusion ratios during exercise suggest?
How do intrapulmonary arteriovenous shunts affect pulmonary vascular pressures during exercise?
How do intrapulmonary arteriovenous shunts affect pulmonary vascular pressures during exercise?
What may be a consequence of increased perfusion of poorly ventilated alveoli during exercise?
What may be a consequence of increased perfusion of poorly ventilated alveoli during exercise?
'Scatter' of ventilation-perfusion ratios can be reduced by which mechanism?
'Scatter' of ventilation-perfusion ratios can be reduced by which mechanism?
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