TRUE or FALSE: All liquid toxicants will rapidly pass through the epidermis and enter the bloodstream.

The assertion that all liquid toxicants will rapidly pass through the epidermis and enter the bloodstream is false. The permeability of the epidermis varies significantly based on the chemical properties of the toxicants, including their molecular size, polarity, and solubility. Some substances can penetrate the skin readily, while others may require specific conditions or may be completely barred from entering the bloodstream due to the skin's protective barrier function.

For instance, the stratum corneum—the outermost layer of the skin—is particularly effective at preventing the absorption of many chemicals. Factors such as the condition of the skin (intact versus damaged), the presence of certain vehicles or enhancers that facilitate absorption, and individual variations among people also play crucial roles in determining how effectively a liquid toxicant can penetrate the skin. Therefore, while some toxicants may enter the bloodstream quickly, it is not a uniform characteristic applicable to all liquid toxicants.