Instill, in medical terms, generally refers to Question 20 options: a) injecting into veins. b) placing medication drops in nose, eyes, or ears. c) injecting into muscle. d) injecting into tissue.

The correct answer is b) placing medication drops in nose, eyes, or ears.  

Explanation:

Instill refers to the action of pouring or introducing a liquid drop by drop on a mucosal surface or inside a canal or organic cavity, for therapeutic purposes. The most used instillations are: conjunctival, nasal, paranasal, atrial, laryngeal, tracheal, bronchial, bladder and urethral. The instillation can be carried out with the help of a simple common dropper or with an instrument called an instillator, which consists of a probe with a widened end and a syringe with a screw plunger; by activating the screw, the medicine is introduced drop by drop.

not always but somethings can be reproduced in a laboratory.