Answer:
No, if "PRN" is on any medication bottle is usually means to use when needed for a specific situation.
Explanation:
I would say the third one!
Answer:
huh? i didnt get the question can u help me understsnd it?
Answer:
First line of defense ⇒ mechanical barriers that prevent microorganisms from entering the body
Second line of defense ⇒ cells and prosses that help remove or neutralize organisms that have penetrated mechanical barriers.
Third line of defense ⇒ complex defense that recognizes and reacts to specific organisms.
I hope this helps!