Fisiologia Respiração 3

Ratio of minute ventilation (VE) to oxygen consumption (VO2), indicating liters of air needed per liter of O2 consumed.

Ratio of minute ventilation (VE) to carbon dioxide production (VCO2), indicating liters of air needed per liter of CO2 expelled.

The ratio between oxygen consumed and carbon dioxide produced during metabolism.

Increased breathing rate/tidal volume; heightened oxygen extraction; enhanced gas exchange efficiency.

True: As exercise intensity increases and anaerobic metabolism becomes more significant, blood lactate levels rise, leading to an increase in hydrogen ions (H+).

False: Ventilatory threshold is the intensity at which lactate concentration begins to increase above resting levels.

At the ventilatory threshold, lactate production and removal are still balanced.

True: Ventilatory threshold is indeed determined as the intensity at which ventilation starts to increase disproportionately to oxygen consumption.

False: In this phase, you need to ventilate more air to consume the same proportion of O2.

The Respiratory Compensation Point is the second abrupt increase in ventilation and is associated with increased carbon dioxide expiration.

A marathon runner has their ventilatory threshold at 80% of their VO2 max due to chronic adaptations.

True: Ventilatory Threshold and Respiratory Compensation Point can be determined through a progressive exercise test with direct measurement of exhaled gases.

The path that air travels to reach the respiratory zone.

The area in the lungs where gas exchange (hematosis) takes place.

True.

The chemical-molecular process that aims to stabilize gas exchange.

Ventilation of the alveoli by mass flow, perfusion of blood at the blood-gas barrier via capillaries and diffusion of gas across the blood-gas barrier are all functions.