30 Questions
What is the definition of exercise-induced arterial hypoxemia (EIAH)?
Condition when O2 carried in arterial blood is severely reduced
What happens to the A-a (alveolar to arterial) PO2 difference during incremental exercise?
It increases
What happens to the venous blood saturation as workload increases during incremental exercise?
It decreases and plateaus around 80%
What is the effect of higher intensity exercise on arterial CO2 levels?
Arterial CO2 levels drop off
What is the impact of tidal volume increase on the VD/VT ratio?
More air going to alveoli, causing VD/VT ratio to increase
What happens to the O2 extraction from blood as workload increases?
It plateaus around 50% max work rate
What happens to the oxygen levels in muscle around 50% O2 extraction from blood?
Oxygen levels plateau
What is the effect of body pumping more blood to muscle during exercise?
More O2 is delivered to the muscle
What is the impact of altitude on atmospheric pressure?
Pressure is lower at altitude
What happens to the O2 levels in arterial and alveolar PO2 at maximal exercise compared to at rest?
They are higher at maximal exercise
What is the definition of ventilation?
Exchange of air
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 physiological dead space related to ventilation?
Volume of air that does not participate in gas exchange
What is hyperpnea in the context of ventilation?
Increased depth and rate of breathing
What is the minute ventilation (VE) in ventilation physiology?
Frequency multiplied by tidal volume
What is the primary reason for not taking a big breath every time during exercise?
Fatigue
What is the function of 'ventilatory drift' in ventilation physiology?
Rise in ventilation after a period of exercise
What is the typical oxygen concentration in room air?
21%
What does the anatomical dead space in ventilation physiology refer to?
1mL/body weight (~150 mL for average person)
What is the formula for alveolar ventilation?
VA = (VT - VD) * frequency
What does the SaO2% measure?
Percentage saturation of oxygen in blood
What causes the oxyhemoglobin dissociation curve to shift to the right?
Increase in CO2
What is the function of the Haldane effect?
Binding of O2 at lungs kicks off CO2 from hemoglobin
What is the primary function of the peripheral chemoreceptors?
Detect hypoxia and hypercapnia
What is the Bohr effect related to?
Effect of CO2 on blood pH and oxygen-hemoglobin affinity
What does the a-vO2 (arterial venous oxygen) difference measure?
Difference in oxygen extraction by muscles
What is the primary source of H+ for the bicarbonate buffering system?
Lactic acid
What is the main function of hyperpnea?
Hyperventilation during heavy exercise
What is the effect of training on capillarization?
Increases capillary amount
Test your understanding of ventilation and respiration with this quiz. Explore topics such as aerobic energy production, the exchange of air, and the processes involved in energy production in living organisms. Get ready to delve into the definitions and concepts related to ventilation and respiration.
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