Final answer:
a sharp rise in minute ventilation at the start of exercise is partially due to an increase in carbon dioxide production, as well as other factors tied to the nervous system and brain's respiratory centers. The statement is true.
Step-by-step explanation:
Is a Sharp Rise in Minute Ventilation at the Onset of Exercise Partly Due to Increased Carbon Dioxide Production?
The statement that a sharp rise in minute ventilation at the immediate onset of exercise is in part a result of increased carbon dioxide production is true.
During physical activity, the muscles increase their demand for oxygen, which leads to an increase in breathing rate and volume, a phenomenon known as hyperpnea.
This increased rate and depth of ventilation is not solely because of changes in oxygen, but also involves high carbon dioxide, low pH levels, and a complex interplay of factors including the nervous system and respiratory centers in the brain.
Hyperpnea starts at the beginning of exercise rather than after a decrease in tissue oxygen levels, meaning that it is driven by other mechanisms in addition to the rise in carbon dioxide.