What is primarily produced by sex hormones?

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Sex hormones, such as androgens (including testosterone) and estrogens, play a significant role in the development and regulation of hair growth in various parts of the body. These hormones affect hair follicle activity, contributing to the characteristics of hair, including its density, texture, and growth patterns. For instance, during puberty, increased androgen levels lead to the development of terminal hair in areas such as the face and underarms in males and females, while estrogen may influence the growth and maintenance of hair on the scalp.

In contrast, skin cells, nails, and fat cells are produced by different cellular processes and do not directly relate to the influence of sex hormones. Skin cells are continuously renewed from the epidermal layer, nails are primarily made of keratin and grow through a different biological process, and fat cells are derived from adipogenesis — the process of fat cell formation, which is influenced by a range of factors, including nutrition and overall metabolism. However, while sex hormones can influence fat distribution in the body, they do not primarily produce fat cells in the way that they influence hair growth. Thus, hair is the correct answer when considering what is primarily produced by sex hormones.

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