Which tissue category has higher water content and lower absorption rate?

• A. Muscle
• B. Skin
• C. Bone
• D. Nerve

Answer: (B)

Tissue water content and how quickly energy or substances are absorbed by the tissue are key factors in how physical agents interact with different tissues. Skin contains a fair amount of water in its dermal layers, and compared with bone it is relatively hydrated. However, the outer keratinized layer and the organized dermal structure act as barriers that slow the rate at which energy or topical agents are absorbed. This combination—substantial water content but a relatively slow absorption rate—matches the description in the question. In contrast, bone is much less hydrated due to its mineral content and tends to interact differently with energy, while muscle and nerve have higher permeability and vascularity, often leading to higher absorption in many PAM contexts.