Answer
Greasy hair and a “shiny nose” are the result of the arrector pili muscle contracting, causing sebum to come out of the hair follicle to the skin surface (shiny nose). If the sebum is forced out directly onto the hair shaft, it results in greasy hair.
Work Step by Step
Greasy hair and a “shiny nose” are the result of the arrector pili muscle contracting, causing sebum to come out of the hair follicle to the skin surface (shiny nose). If the sebum is forced out directly onto the hair shaft, it results in greasy hair.