Minnesota Cosmetology State Practice Exam

Hair porosity is the ability of hair to absorb and retain moisture. It is highest at the ends of the hair due to the natural wear and tear of styling, exposure to sun and chemicals. This level of porosity decreases towards the scalp, where hair receives natural oils for protection. The middle portion of the strand typically has the lowest porosity as it is protected by the overlapping cuticle layer. Option B is incorrect because hair porosity at the scalp is lower due to the natural oils produced by the scalp. Option C is incorrect because the middle portion of the hair strand has the lowest porosity as it is protected by the overlapping cuticle layer. Option D is incorrect because hair porosity can vary depending on factors such as genetics, damage, and hair care routine, so it is not necessarily even throughout the hair.