30 Questions
What is the definition of hyperpnea?
Increased depth and rate of breathing
What is the triphasic response in ventilation?
3 phases of response
What is the physiological dead space primarily due to?
Non-perfused alveoli
What is the minute ventilation (VE) equal to?
Frequency multiplied by tidal volume
What is the function of 'ventilatory drift'?
Rise in ventilation after a period of exercise
What is the primary reason for not taking a big breath every time?
Dead space to tidal volume ratio
What is the anatomical dead space approximately equal to for an average person?
150 mL
What does the VD/VT ratio measure?
Gas exchange efficiency
What is the tidal volume (VT) responsible for during exercise?
Initial increase in minute ventilation
What is the primary factor affecting minute ventilation during exercise?
Work rate
What is the function of peripheral chemoreceptors?
Detect hypoxia and hypercapnia
What is the effect of bronchodilation?
Decreases resistance in airways with exercise
What is the primary function of the Haldane effect?
Kicks off CO2 from hemoglobin at the lungs
What is the effect of a left shift in the oxyhemoglobin dissociation curve?
Enhances oxygen binding to hemoglobin
What is the primary function of the Bohr effect?
Decreases affinity of oxygen for hemoglobin
What is the primary function of the central chemoreceptors?
Detect pH
What is the primary function of the bicarbonate buffering system?
Regulates blood pH by removing H+ ions
What is the primary function of hyperpnea?
Hyperventilation during heavy exercise
What is the primary function of the a-vO2 difference?
Tells the difference in energy production/consumption
What is the primary function of alveolar ventilation (VA)?
Calculates the volume of fresh air reaching the alveoli per minute
During incremental exercise, what happens to the venous blood saturation as workload increases?
It decreases and plateaus around 80% of max intensity
What causes the A-a (alveolar to arterial) PO2 difference during incremental exercise?
Increase in tidal volume causing VD/VT ratio
What happens to the O2 extraction from blood during incremental exercise?
It plateaus around 50% of max work rate
What is the definition of Exercise-induced arterial hypoxemia (EIAH)?
Condition when O2 carried in arterial blood is severely reduced
What happens to the atmospheric pressure at altitude compared to sea level?
It is lower at altitude
What is the effect of higher intensity exercise on arterial CO2 levels?
Arterial CO2 levels drop off
What happens to the O2 levels in muscle during incremental exercise?
O2 levels plateau around 50% of max intensity
What is the impact of increase in tidal volume on the VD/VT ratio?
It causes VD/VT ratio to increase
What happens to the alveolar ventilation during incremental exercise?
It follows minute ventilation
What causes the pressure to be lower at altitude?
Atmospheric pressure is lower at altitude
Test your knowledge of respiratory physiology with this quiz covering topics such as ventilation, aerobic energy production, respiration, and the exchange of gases. Dive into the details of oxygen intake, carbon dioxide release, and the factors affecting gas exchange in the body.
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