Chemistry High School

The pH of the urine of four people, of equal mass, was measured under varying conditions, such as sleep, rest, moderate activity, and extreme activity. The results are given in the following table. Which person was likely asleep? Which person was likely most active? Provide support for your answers. Why is dynamic equilibrium of pH in human systems so important? Explain using 2 examples that you have studied.
Person Ph of urine
A 5.8
B 4.5
C 8.0
D 6.0

Answers

Answer 1

The pH of urine can provide insights into the metabolic state of an individual.

Person likely asleep: Person C (pH 8.0)

Person likely most active: Person B (pH 4.5)

The pH of urine can provide insights into the metabolic state of an individual. Typically, the pH of urine varies depending on factors such as diet, hydration level, and physical activity. During sleep, the body is in a relatively relaxed state, and metabolic activity is reduced. As a result, the pH of urine tends to increase, becoming more alkaline. Person C has a pH of 8.0, indicating a higher alkaline level, which suggests that they were likely asleep when their urine was tested.

On the other hand, during periods of increased physical activity, the body undergoes various metabolic processes that can affect urine pH. When engaging in intense physical activity, the body produces more lactic acid due to increased muscle exertion. This can cause the pH of urine to decrease, becoming more acidic. Person B has a pH of 4.5, which is lower than the other individuals, suggesting that they were likely most active at the time of urine measurement.

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