Iowa Pesticide Applicator Practice Exam

Which bodily area is most resistant to pesticide absorption?

1. Palms

2. Genitals

3. Forehead

4. Foot soles

The correct answer is: Palms

The palms of the hands are notably less permeable compared to other areas of the body, making them more resistant to pesticide absorption. The skin structure on the palms is thicker and has fewer hair follicles, which reduces the opportunity for chemicals to penetrate. Additionally, the outer layer of skin, known as the stratum corneum, is more robust in this area, serving as a barrier against various substances, including pesticides. In contrast, the genitals and forehead have thinner skin and a higher density of blood vessels, allowing for increased absorption of various substances. The soles of the feet, while having thick skin similar to the palms, may be less resistant at times due to moisture and increased surface area contact with the ground, which can facilitate absorption of chemicals. Understanding these variations in skin permeability helps in assessing the risk of pesticide exposure in different parts of the body.