30 Questions
Which of the following factors affect minute ventilation (VE)?
Neural drive and body temperature
What is the function of peripheral chemoreceptors?
Detect hypoxia and hypercapnia
Where are the central chemoreceptors located?
Brain
What is the formula for calculating alveolar ventilation (VA)?
VA = (VT - VD) * frequency
What is the normal blood pH at rest?
~7.4
What is the effect of the Bohr effect on oxygen binding to hemoglobin?
Decreases affinity of oxygen for hemoglobin
What is the primary source of H+ in the bicarbonate buffering system?
Lactic acid
What is the main function of hyperpnea?
Increase minute ventilation
What is the primary form of CO2 transport in the blood?
Bicarbonate
What happens to the a-vO2 (arterial-venous oxygen) difference during exercise?
Increases
Which of the following is the definition of respiration?
The intake of oxygen and release of CO2 from oxidation of complex organic substances.
What is the definition of ventilation?
The exchange of air.
What is the formula for minute ventilation?
VE = frequency * tidal volume
What is the definition of hyperpnea?
Increased depth and rate of breathing.
What is the definition of 'ventilatory drift' and its function?
A rise in ventilation after a period of exercise, it makes breathing inefficient and breathes unnecessary air.
What is the measure of gas exchange efficiency called?
VD/VT ratio
What is the VD/VT ratio at rest?
0.33
What is the VD/VT ratio during exercise?
0.075
What factors can affect ventilation during exercise?
Work rate, fitness level, and RBCs amount
Why don't we take a big breath every time?
Fatigue and time
Which of the following is true about ventilation?
Ventilation has break points where it increases faster
What does an increase in tidal volume cause?
Increase in A-a PO2 difference
What happens to minute ventilation as frequency increases?
Minute ventilation increases
At what intensity of maximum exercise does the gradient for oxygen into the blood increase?
80%
What happens to venous blood saturation as workload increases?
Venous blood saturation decreases
What happens to arterial CO2 levels at higher intensity exercise?
Arterial CO2 levels decrease
What is the atmospheric pressure at sea level?
760 mm Hg
What is the definition of exercise-induced arterial hypoxemia (EIAH)?
Condition when arterial blood carries less O2 than usual
What is considered a severe level of exercise-induced arterial hypoxemia (EIAH)?
SaO2 reduced by 4%
What happens to the oxygen levels in the blood during incremental exercise?
Oxygen levels plateau around 50%
Test your knowledge on ventilation and aerobic energy production in this quiz. Learn about respiration and ventilation definitions, as well as the importance of oxygen intake during exercise. Explore concepts such as partial pressure and volume in relation to gas exchange.
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