Which term describes the tissue level?

Which term describes the tissue level?

• A. Tissue level of drug action
• B. Molecular level of drug action
• C. Systemic regulation
• D. Cellular transduction

Answer: (A)

This item tests how we categorize where a drug acts in the body. The tissue level of drug action describes how a drug produces a functional change across a tissue as a unit, reflecting coordinated responses of many cells within that tissue, not just a single cell or a molecular event. It sits between cellular and systemic levels, capturing tissue-wide effects such as altered contraction, secretion, or permeability that result from the collective activity of the tissue’s cells. By contrast, the molecular level focuses on drug–receptor binding at the molecular scale, cellular transduction is about signaling within one cell, and systemic regulation refers to whole-body control. So describing the tissue level fits best when the question asks for a tissue-wide action.

This item tests how we categorize where a drug acts in the body. The tissue level of drug action describes how a drug produces a functional change across a tissue as a unit, reflecting coordinated responses of many cells within that tissue, not just a single cell or a molecular event. It sits between cellular and systemic levels, capturing tissue-wide effects such as altered contraction, secretion, or permeability that result from the collective activity of the tissue’s cells. By contrast, the molecular level focuses on drug–receptor binding at the molecular scale, cellular transduction is about signaling within one cell, and systemic regulation refers to whole-body control. So describing the tissue level fits best when the question asks for a tissue-wide action.