Final answer:
The inappropriate nursing action during ear medication application is instilling the medication directly into the tympanic membrane. The ear pinna should be pulled upward in adults, medication should be warmed, and the tragus pressed to help flow of medication.
Step-by-step explanation:
During the application of medication into the ear, the inappropriate nursing action is B. Instill the medication directly into the tympanic membrane. This practice should be avoided as it can damage the sensitive structures of the ear. Correct procedures include A. In an adult, pull the pinna upward to straighten the ear canal, C. Warm the medication at room or body temperature to prevent dizziness, and D. Press the tragus of the ear a few times to assist the flow of medication into the ear canal.
For question 4, the appropriate and convenient route of administration for home administration of an antimicrobial to treat a systemic infection would be A. oral. Intravenous and parenteral administration require specialized equipment and professional training, while the topical application is not appropriate for a systemic infection.