If a chemical reaction was happening in our bodies, what evidence would we see of substances going into or coming out of our bodies?
What does this tell you about the difference between the air we breathe in and the air we breathe out?
How does glucose get from the small intestine into the blood? Why?
How does this help you predict how the air we breathe in and the carbon dioxide we breathe out might pass between the lungs and the blood?
Where are oxygen levels the highest?
What clues does this give us about where the chemical reaction might be happening that uses food and oxygen to provide energy?
What happens to the glucose levels in the blood right after a meal? Why does this happen?
What is different about how glucose levels change when you exercise after meals versus when you don’t?
What does this tell us happens to the rate at which the chemical reaction between food and oxygen occurs when we exercise?
Why would more of that reaction need to occur when we exercise?
Where are they the lowest?
Where do they change the most?
Where are carbon dioxide levels the highest?
Where are they the lowest?
Where do they change the most?