Which of the following is NOT a component of the eccrine sweat solids?

The correct response identifies "proteins" as not being a component of eccrine sweat solids. Eccrine sweat is primarily composed of water, but it also contains various solutes that contribute to its overall composition.

Urea, a waste product that is excreted through the sweat, is one of the commonly recognized components. Additionally, amino acids are present in small quantities and play a role in the sweat's physiological function. Sodium chloride, or salt, is another significant component, as it contributes to the sweat’s taste and helps with thermoregulation.

In contrast, proteins are generally not a major component of eccrine sweat solids. While some minor protein content may be present due to cellular debris or in trace amounts, the primary constituents that influence the properties of eccrine sweat are the electrolytes and organic constituents listed above. Thus, understanding the typical components of eccrine sweat helps clarify why proteins are categorized differently from the other options.