13.04 - Lungs and Exercise: IOHA ICA

How much can pulmonary ventilation increase during maximal exercise?

• Up to 10 fold

• Up to 20 fold

• Up to 5 fold

• Up to 30 fold

What is the main muscle involved in breathing?

• The heart

• The diaphragm

• The intercostal muscles

• The abdominal muscles

What increases during exercise to meet the body's oxygen demand?

• Heart rate only

• Respiratory rate only

• Both respiratory rate and volume of air per breath

• Neither, the body uses less oxygen

What is the role of the alveoli in the respiratory system?

• To facilitate gas exchange

• To produce carbon dioxide

• To store oxygen

• To pump blood

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What happens to the diaphragm during inhalation?

• It relaxes and pulls downwards

• It contracts and moves upwards

• It contracts and pulls downwards

• It relaxes and moves upwards

What happens to oxygen consumption during maximal exercise in a fit individual?

• It remains the same

• It decreases

• It increases significantly

• It increases slightly

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How does the body compensate for increased oxygen demand during exercise?

• By decreasing heart rate

• By increasing lung capacity

• By increasing respiratory rate and volume of air per breath

• By reducing oxygen consumption

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What is the maximal oxygen consumption of a marathon runner during exercise?

• 5100 milliliters per minute

• 4000 milliliters per minute

• 250 milliliters per minute

• 3600 milliliters per minute

Is total lung capacity a limiting factor in oxygen delivery during maximal exercise?

• Only at high altitudes

• No, not even close

• Yes, always

• Only in untrained individuals

Can exercise increase the size of the thoracic cavity?

• No, it remains the same

• Yes, significantly

• Only with specific exercises

• Only in children