Which statement about RER is true?

Unlock all questions

This demo includes only 20 questions. Upgrade to access hundreds of questions, flashcards, exam simulations, and disable ads.

Full question bankExam simulationsFlashcards
From $25.99Unlock all

Study the AQA A Level PE Test for The Cardiovascular System. Prepare with flashcards and multiple choice questions, each with explanations. Get ready for exam success!

Multiple Choice

Which statement about RER is true?

Explanation:
RER shows which substrates are being oxidized by comparing CO2 produced to O2 consumed. Fat metabolism typically gives values around 0.7–0.8, while carbohydrate metabolism pushes toward 1.0. When exercise is very intense, RER can rise above 1.0 because buffering of lactate produces extra CO2, temporarily raising the ratio; this still indicates carbohydrate-dominant metabolism. This is why a value above 1 is associated with greater carbohydrate use. Statements suggesting higher RER means fat oxidation, or that around 0.85 equals exclusive fat use, aren’t accurate, and RER does provide information about substrate use.

RER shows which substrates are being oxidized by comparing CO2 produced to O2 consumed. Fat metabolism typically gives values around 0.7–0.8, while carbohydrate metabolism pushes toward 1.0. When exercise is very intense, RER can rise above 1.0 because buffering of lactate produces extra CO2, temporarily raising the ratio; this still indicates carbohydrate-dominant metabolism. This is why a value above 1 is associated with greater carbohydrate use. Statements suggesting higher RER means fat oxidation, or that around 0.85 equals exclusive fat use, aren’t accurate, and RER does provide information about substrate use.

More Multiple Choice Questions
Subscribe

Get the latest from Passetra

You can unsubscribe at any time. Read our privacy policy