Answer Happy

Follow-up Question 4: Compare your breath-hold times for Trial 5 (maximal inhalation following exercise) and Trial 2 (maximal inhalation). Typically, a person can hold their breath longer during Trial 2. (Note: Your results may have been different). What is the best explanation for why most people are normally able to hold their breaths longer during Trial 2 versus Trial 5? O The lung volume is larger during Trial 2, which allows more oxygen to be stored in the lungs during the breath- hold. O The production of CO2 from the body's tissues was higher in Trial 5, allowing less time to elapse before arterial PCO2 built up to the critical level triggering people to breathe. O The consumption of O2 in the body's tissues was lower in Trial 5, allowing less time to elapse before arterial PO2 became so low that triggered people to breathe. O In Trial 2 the arterial levels of PCO2 were higher just prior to the start of the breath-hold when compared to Trial 5. This caused more time to elapse before arterial PCO2 built up to the critical level triggering people to breathe. 4 Previous