Question

multiple choice (1 point). a student blows into a solution of bromothymol blue (btb) before and after exercise. the btb changes from blue to yellow faster after exercise. which statement best explains this result? exercise decreases the amount of oxygen used by cells. exercise increases the amount of carbon dioxide produced by cells. exercise decreases the temperature of the btb solution. exercise increases the rate of photosynthesis in cells. reasoning: connect cellular respiration (co2 production) and feedback responses to how our body maintains balance (homeostasis) during activity.

Explanation:

Bromothymol blue (BTB) is an indicator that changes color in response to the presence of carbon - dioxide. During exercise, cellular respiration increases, leading to more carbon - dioxide production by cells. An increase in carbon - dioxide in the BTB solution causes it to change from blue to yellow.

Answer:

Exercise increases the amount of carbon dioxide produced by cells.