Question

Compared to rest, during exercise, PO2 is high and PCO2 is low inside contracting muscle fibers.

Answer 1

Answer:

False

Explanation:

During exercise, contraction of muscles take place and when this happens, a large amount of oxygen is consumed producing large amounts of carbon-di-oxide as byproduct.

Therefore, during exercise, oxygen is consumed  in large quantity thus resulting in low partial pressure of oxygen and high partial pressure of carbon-di-oxide as it is produced in large amount as a byproduct.