Prompt:
Rosa eats a peanut butter sandwich for lunch. Peanut butter contains a lot of protein, and bread is mostly starch. Rosa plans to go for a run later this afternoon. Rosa is breathing normally.

(answer all parts) Questions:
What does she need from the food she ate and the air she breathes so that she can go on her run?
How do Rosa’s body systems work together to get the molecules she needs into her cells?
How do her cells use these molecules to release energy for her body to run?

What does she need from the food she ate and the air she breathes so that she can go on her run? eating enough food, because cells need molecules from both food and air to work

How do Rosa’s body systems work together to get the molecules she needs into her cells? These body systems all function to maintain the cells in your body: the circulatory, respiratory, and digestive systems provide the nutrients and energy your cells need to live.

How do her cells use these molecules to release energy for her body to run?Chemical energy is stored in the bonds of sugars. When a sugar molecule is broken down, a usable form of energy is released for the cell's life functions. Cells can release energy in two basic processes: cellular respiration and fermentation. ... In cells use oxygen to release energy stored in sugars such as glucose.