Which of the following respiratory exchange ratios (RERs) is typical for a resting individual?Group of answer choices0.780.950.710.89

Break Down the Problem

1. Identify the question: We need to determine the typical respiratory exchange ratio (RER) for a resting individual from the provided options.
2. Understand RER: The respiratory exchange ratio is defined as the ratio of carbon dioxide produced to oxygen consumed (RER = VCO2/VO2).

Relevant Concepts

1. Typical RER for Resting: In a resting individual, the RER usually ranges between 0.7 and 0.8, which reflects a predominance of fat metabolism over carbohydrate metabolism.

Analysis and Detail

1. Options Provided:
   • 0.78
   • 0.95
   • 0.71
   • 0.89
2. Evaluating each option:
   • 0.78: This value falls within the resting range.
   • 0.95: This value indicates a higher contribution from carbohydrates and is typical during high-intensity exercise.
   • 0.71: Although within the expected range, it is on the lower end and less typical for an average resting state.
   • 0.89: This suggests a significant carbohydrate usage, which is not usual for resting.

Verify and Summarize

1. Comparison: The value of 0.78 is the most appropriate representation for a resting individual's RER among the options provided, as it comfortably fits within the typical metabolic range for resting states.
2. Confirmation: The other values suggest higher contributions from carbohydrates, usually associated with more active states.

Final Answer

The typical respiratory exchange ratio (RER) for a resting individual is 0.78.