All of the following are physical barriers EXCEPT:

Calcium needs are increased during adolescence because approximately 45% of peak bone mass is attained during this time period

A) The statement is correct, but the reason is not. B) Both the statement and reason are correct but not related. C) Both the statement and reason are correct and related. D) Neither the statement nor the reason is correct. E) The statement is not correct, but the reason is correct.

Which surgical approach involves insertion of a scope through an opening to visualize and aid in the performance of a procedure?

A. Via natural or artificial opening endoscopic approach B. Via natural or artificial opening approach C. Percutaneous endoscopic approach D. Percutaneous approach