Question

complete each sentence by selecting the proper word or phrase from each drop - down. 1. skin contains keratin and desmosomes that confer a mechanical strength to the epidermis which creating a barrier to some fluids such as punctures and abrasions. 2. as a result of impermeable cellular junctions and water - proofing lipids, the epidermis functions in resists mechanical traumas. 3. the skin assists endocrine function by playing a role in vitamin - d synthesis which is needed for calcium homeostasis.

Explanation:

1. Keratin and desmosomes in skin give mechanical strength to epidermis, helping resist physical damage like punctures and abrasions by creating a barrier to some fluids.
2. Impermeable cellular junctions and waterproof - lipids make the epidermis resist mechanical traumas.
3. Skin plays a role in vitamin - D synthesis which is crucial for calcium homeostasis, thus assisting in endocrine function.

Answer:

1. creating a barrier to some fluids
2. resists mechanical traumas
3. vitamin - D synthesis