Answer
if one muscle shorten during contraction the opposing muscle across the joint must relax
Answer:
It is important that the phospholipid bilayer is both hydrophobic in the surface and hydrophilic inside to control and manage the incoming organic compounds mainly water from exceeding the needed amount or destablizing the concentration established by the cells.
This represents the anaerobic part of cellular respiration, this specifically would represent the Krebs cycle. I highly doubt that they want you to be that specific, so Cellular respiration
