Yes, all animals inhale (in) and exhale (out). Except for fish.
Competitive inhibition vs allosteric inhibition
In competitive the substrate and inhibitor bind at the same active site - pretty straightforward. In allosteric regulation (speaking specifically about inhibition here), the inhibitor is binding at a site other than the active site, and changing the enzyme in some way to make it inactive.
I took the test and the answer is not shear, so don't put that one. My next choice would have been strain.
