Answer Happy

Work through each of the questions and answer where appropriate. Note that some questions are worth points while others are not. Question 8 Follow-up Question 1: Compare your breath-hold times for Trial 1 (maximal inhalation following hyperventilation) and Trial 2 (maximal inhalation). Typically, a person can hold their breath longer during Trial 1. (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 1 versus Trial 2? 1 pts O The lung volume is larger during Trial 1, which allows more oxygen to be stored in the lungs during the breath- hold. O During Trial 1, the levels of arterial Pco2 were lower before the start of the breath-hold when compared to Trial 2. This caused more time to elapse before arterial Pco2 built up to the critical level triggering people to breathe. O The production of CO₂ from the body's tissues was lower in Trial 1, allowing more time to elapse before arterial Pco2 built up to the critical level triggering people to breathe. k Hyperventilating in Trial 1 caused the Poz levels in the blood to dramatically go up, allowing people to hold their breath for a longer duration.