Kentucky Barber Practice Exam

The sebaceous glands are mainly responsible for secreting sebum, an oily substance that helps moisturize and protect the skin. Melanin is produced by melanocytes and gives skin its color, but it is not secreted by sebaceous glands. Saliva is produced by salivary glands and is not related to the sebaceous glands. Perspiration is produced by sweat glands and serves to regulate body temperature, but it is not secreted by the sebaceous glands.