24 Questions
What is the definition of hyperpnea?
Increased depth and rate of breathing
What is the triphasic response related to ventilation?
3 phases of response
What does the VD/VT ratio measure?
Measure of gas exchange efficiency
What is the purpose of 'ventilatory drift'?
Rise in ventilation after a period of exercise
What causes the VD/VT ratio to increase?
Increase in tidal volume
What happens to the A-a (alveolar to arterial) PO2 difference during incremental exercise?
It increases
At what intensity of max exercise does the gradient for alveolar ventilation increase?
Around 80%
What happens to O2 extraction from blood at around 50% max work rate?
It plateaus
What happens to venous blood saturation as workload increases?
It decreases and then plateaus
What leads to exercise-induced arterial hypoxemia (EIAH)?
Less oxygen in arterial blood during exercise
What happens to atmospheric pressure at higher altitudes?
It decreases
What happens to O2 levels at the alveolar and arterial levels during maximal exercise compared to rest?
They are higher
What is the formula for alveolar ventilation (VA)?
VA = (VT - VD) * frequency
Where are the central chemoreceptors located?
Brain
What does the oxyhemoglobin dissociation curve shift to the right from?
Increase in CO2
What is the normal blood pH at rest?
Around 7.4
What is the function of peripheral chemoreceptors?
Detect hypoxia and hypercapnia
What is the effect of CO2 on blood pH?
Decreases affinity of oxygen for hemoglobin
What is the main function of alveoli in the lungs?
Gas exchange
What is the primary source of H+ in the body?
Lactic acid
What does the Haldane effect refer to?
Binding of O2 at lungs kicks off CO2 from hemoglobin
What is hyperpnea?
Hyperventilation
What does the a-vO2 difference measure?
Oxygen extracted by muscles from blood
What does the SaO2% represent?
Percentage saturation of oxygen in blood
Test your knowledge of aerobic energy production and respiration with this quiz. Explore the definitions of respiration and ventilation, and understand the importance of oxygen intake during exercise for energy production. Get ready to dive into the key concepts of partial pressure and gas exchange.
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