Final answer:
Rectal suppositories for adults typically weigh around 4 grams, suitable for administering medication via the rectal route, compatible with the volume of the large intestine.
Step-by-step explanation:
The correct answer to the question regarding the typical weight of rectal suppositories intended for adult use is D. 4 g. These suppositories are designed to be administered via the rectal route and dissolve or melt at body temperature, releasing medication for absorption through the rectal mucosa. The specified average weight ensures that they contain an adequate dose of medication suitable for adult patients while maintaining a size that can be comfortably administered.
The large intestine, where the suppository is introduced, generally has a length of about 1.5 meters and holds between 6 and 7 liters. The total volume of gut microbes in the large intestine is a smaller volume of a few hundred milliliters, which does not significantly affect the functioning of the suppository.