Bone mass declines as part of the aging process. What are the
main reasons for the decrease in bone mass?
Question 2
Catabolic pathways that require oxygen are referred to as _____. Catabolic pathways that can function with low levels of oxygen are called _____.
A. aerobic, anaerobic
B. anaerobic, aerobic
C. energy producing, energy requiring
D. energy requiring, energy producing