30 Questions
What is the definition of ventilation?
Exchange of air
What is the triphasic response in ventilation?
3 phases of response
What is hyperpnea?
Increased depth and rate of breathing
What is the physiological dead space in ventilation?
Volume of air that does not participate in gas exchange
What is the VD/VT ratio used to measure?
Gas exchange efficiency
What is the minute ventilation (VE) equal to?
Frequency multiplied by tidal volume
What is the primary reason for not taking a big breath every time?
Fatigue
What is the function of 'ventilatory drift'?
Helps acid base balance
What is the anatomical dead space in ventilation?
1mL/body weight
What is the tidal ventilation responsible for?
Initial increase in minute ventilation
What is the function of bronchodilation?
Decreases resistance in airways with exercise
What is the function of peripheral chemoreceptors?
Detect hypoxia and hypercapnia
What is the normal blood pH at rest?
Approximately 7.4
What does the oxyhemoglobin dissociation curve shift to the left indicate?
Enhances oxygen binding to hemoglobin
What is the primary function of the Haldane effect?
Kicks off CO2 from hemoglobin at the lungs
What is the primary source of H+ in the body?
Lactic acid, carbonic acid, ketoacidosis
What does hyperpnea refer to?
Hyperventilation during heavy exercise
What does the a-vO2 difference in blood indicate?
Difference in oxygen extraction by muscles
What happens to the PaCO2 during low exercise?
It may decrease due to higher rate of gas exchange
What is the primary function of the bicarbonate buffering system for lactic acid?
To regulate blood pH
What is the definition of Exercise-induced arterial hypoxemia (EIAH)?
Condition when O2 carried in arterial blood is severely reduced
What happens to the alveolar-arterial (A-a) PO2 difference during incremental exercise?
It increases
What happens to the venous blood saturation as workload increases during incremental exercise?
It decreases and then plateaus around 80%
What is the effect of higher intensity exercise on arterial CO2 levels?
They drop off
What is the impact of an increase in tidal volume on the VD/VT ratio?
It causes the VD/VT ratio to increase
What is the reason for the body pumping more blood to muscles during exercise?
To deliver more oxygen to the muscles
What happens to the oxygen levels in muscle as the O2 extraction from blood plateaus around 50% of max work rate?
O2 levels plateau around 50%
What is the effect of altitude on atmospheric pressure?
Pressure is lower at altitude
What is the impact of ventilation on the increase in minute ventilation?
Ventilation is not a linear increase; it has break points where it increases faster
What happens to the oxygen levels in the blood as it travels from the atmosphere to the mitochondria?
Oxygen gradually declines in mm Hg from gradients to travel from atmosphere to mitochondria
Test your knowledge of ventilation, aerobic energy, and respiration with this quiz. Explore the processes involved in energy production, the exchange of air, and the role of oxygen in exercise. Challenge yourself with questions about partial pressure, volume, and the alveolar-venous difference.
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