Respiratory Physiology Quiz

What is the primary energy source during short-term high-intensity exercise?

Which system produces 38 ATP from the breakdown of glucose?

What is the term for the amount of extra oxygen required by muscle tissue during recovery from vigorous exercise?

During which type of exercise is oxygen not required?

What is the byproduct of glycolysis?

How much ATP is produced during the phosphagen system?

What is the primary energy source during long-term low-intensity exercise?

Which system has a duration of 15 seconds to 2 minutes?

What is EPOC an alternative terminology for?

Why does our respiratory rate increase after stopping heavy exercise?

What is the formula to calculate oxygen deficit?

What is the primary reason for EPOC during the recovery period?

What happens to an unacclimatized aviator at an altitude of 23,000 feet?

Why must an airplane be pressurized above 50,000 feet?

During exercise, which of the following occurs in the oxygen-hemoglobin dissociation curve?

What is one of the factors that stimulates breathing during exercise?

What is the effect of exercise on cardiac output?

What is the result of increased ventilation during exercise?

What is the role of skeletal and respiratory pumps during exercise?

What is the effect of exercise on the peripheral chemoreceptors?

What is the effect of exercise on stroke volume?

What is the role of local vasodilation during exercise?

Arterial blood has a higher Pao2 and lower Paco2 compared to venous blood
Pulmonary blood flow increases during exercise, shifting the O2-hemoglobin dissociation curve to the right
Despite increased CO2 production during exercise, PaCO2 remains normal due to increased ventilation

Phosphagens provide immediate energy (1 ATP) during exercise
Glycolysis generates 2 ATP from glycogen through anaerobic respiration
Oxidative phosphorylation generates 38 ATP from glucose, fatty acids, and amino acids through aerobic respiration

Oxygen debt is the amount of extra oxygen required by muscle tissue during recovery from vigorous exercise
EPOC (Excess Post-exercise Oxygen Consumption) is another term for oxygen debt
Oxygen debt is measured as the difference between oxygen required during exercise and at rest
During exercise, oxygen deficit occurs when oxygen demand exceeds supply, leading to anaerobic respiration

At 12,000-15,000 feet, a normal person becomes lethargic and loses mental alertness
At 23,000 feet, an unacclimatized person becomes comatose within 20-30 minutes
With pure oxygen, a pilot can ascend to an altitude of about 47,000 feet
Above 50,000 feet, an airplane should be pressurized

Respiratory response to exercise:
- Increase O2 consumption 10-20 times at rest
- Pulmonary hyperventilation
- Increased cardiac output
- Local vasodilation of muscles
- Shift of O2-hemoglobin dissociation curve to the right
Factors that stimulate breathing during exercise:
- Signals from cerebral and afferent signals from joint and muscle mechanoreceptors
- Increased plasma K+ and body temperature that stimulate peripheral chemoreceptors