30 Questions
Which of the following factors contribute to bronchodilation?
Neural drive
What is the function of peripheral chemoreceptors?
Detect hypoxia and hypercapnia
Where are the central chemoreceptors located?
Brain
What is the normal blood pH at rest?
7.4
What is the formula for calculating alveolar ventilation (VA)?
VA = VT - VD
What is the primary gas responsible for influencing pH levels in the body?
Carbon dioxide
What is the effect of the Bohr effect on the affinity of oxygen for hemoglobin?
Decreases affinity
What is the primary source of H+ ions in the body?
Lactic acid
What is the primary form of CO2 transport in the blood?
As bicarbonate
What happens to the a-vO2 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 in the lungs
What is the formula for minute ventilation (VE)?
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
What is the measure of gas exchange efficiency known as?
VD/VT ratio
What is the VD/VT ratio at rest?
0.33
What factors can affect ventilation during exercise?
Work rate, fitness level, and RBCs amount
What is the approximate oxygen concentration in room air?
21%
What is the triphasic response during exercise?
A three-phase increase in ventilation
During exercise, what happens to the A-a (alveolar to arterial) PO2 difference?
It increases
What happens to the oxygen levels in the muscle during incremental exercise?
They plateau around 50%
What happens to the oxygen extraction from blood during incremental exercise?
It decreases
What happens to the venous blood saturation as workload increases during incremental exercise?
It decreases
What is the atmospheric pressure at sea level?
760 mm Hg
What is the definition of exercise-induced arterial hypoxemia (EIAH)?
A condition when O2 carried in arterial blood is severely reduced
During exercise, what happens to the oxygen levels in the alveoli?
They increase
What happens to the mean capillary and Mb (myoglobular) oxygen levels during maximal exercise?
They decrease
What happens to the oxygen levels from the atmosphere to the mitochondria?
They go to 0
What happens to the pressure at higher altitude?
It decreases
Test your knowledge on respiration and ventilation with this quiz! Explore the processes involved in energy production, the exchange of air, and key terms like partial pressure and volume. Challenge yourself and expand your understanding of aerobic energy and its relationship to oxygen intake.
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