Dr. kroeppler wants to record a recommendation on an injection involving an integumentary system protein. if he needs to identify the protein that provides firmness and strength to the skin, he would describe

keratin.
collagen.
elastin.
melanin.

keratin.

collagen.

elastin.

Explanation:

Elastin and collagen are found in the dermis and are produced by fibroblasts, are responsible for giving firmness, strength and elasticity to the skin.

Keratin is in the epidermis, this protein helps to preserve or recover the elasticity and firmness of the skin, also helps in cell regeneration and support the tissue where it accumulates.

answer:

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