Your answers look pretty good! A couple of things worth mentioning:
Question 2 -- I was looking for "lumen" and "tunica media" respectively, but your response was acceptable.
Question 5 -- When you hyperventilate, you exhale a lot of CO2, and this lowers your blood pH because the hydrogen ion concentration of your blood increases depending on the amount of CO2 you have in your system (think back to the equation CO2 + H20 => H2CO3 => HCO3- + H+). Breathing back this air will readjust your blood pH.
"Perhaps one did not want to be loved so much as to be understood." -- George Orwell, 1984
Events 2019: A&P, Heredity, Picture This, P&P