Answer:
RSI - Repetitive Strength Injury
Explanation:
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I see you don't have any answer listed. However, I'll add a few that I feel are important to achieve good physical fitness. The first key one would be exercise. We need to keep our body's blood moving as well as our joints, muscles, ligaments and bones all in good condition. When we do things such as cardio, aerobic exercises and those similar, it helps with our heart, lungs and various other things. Now, part two of this would be proper nutrition. We're unable to meet our full potential with our bodies if we only do one and not the other. Proper nutrition is key to maintaining a healthy body and needed just as much as exercising. Eating right will not only make us feel better but make our body better as well!
So, when you combine proper nutrition and exercise, anyone can achieve good physical fitness. Hope this helped!
Answer: first statement that Keratin is a protein in the cells of the epidermis that provides strength and waterproofing is correct
Explanation:
The outer layer of skin, the epidermis, provides waterproofing and serves as a barrier to infection.
The middle layer of skin, the dermis, contains blood vessels, nerves, and glands that are important for our skin’s function. The inner layer of the skin, the subcutis, contains fat that protects us from trauma. The cells in all of the layers except the stratum basale are called keratinocytes. A keratinocyte is a cell that manufactures and stores the protein keratin. Keratin is an intracellular fibrous protein that gives hair, nails, and skin their hardness and water-resistant properties.
Keratin is an important protein in the epidermis. Keratin has two main functions: to adhere cells to each other and to form a protective layer on the outside of the skin. In epithelial cells, keratin proteins inside the cell attach to proteins called desmosomes on the surface.
