Question

cellular respiration virtual lab
(1) what gas are you exhaling into the bromothymol blue solution?
(2) why did the bromothymol blue solution change?
(3) what is the impact of heart rate and breath rate on the color change.
(4) what is cellular respiration?

Explanation:

1. When exhaling into bromothymol blue solution, carbon - dioxide gas is being exhaled. This is a product of cellular respiration in the body.
2. Bromothymol blue is a pH indicator. Carbon - dioxide dissolves in water to form carbonic acid, which lowers the pH of the solution. This change in pH causes the bromothymol blue solution to change color.
3. A higher heart rate and breath rate mean more oxygen is being taken in and more carbon - dioxide is being produced. This would cause a faster color change in the bromothymol blue solution as more carbon - dioxide is available to lower the pH.
4. Cellular respiration is a set of metabolic reactions and processes that take place in the cells of organisms to convert biochemical energy from nutrients into adenosine triphosphate (ATP), and then release waste products. It can occur aerobically (with oxygen) or anaerobically (without oxygen).

Answer:

1. Carbon - dioxide gas.
2. Because carbon - dioxide from exhalation forms carbonic acid, changing the pH.
3. Higher heart and breath rates lead to faster color change due to more carbon - dioxide production.
4. A set of metabolic reactions in cells to convert nutrients into ATP and release waste products.