Colorado Esthetician Written Practice Exam

Which gland is responsible for the secretion of sebum?

1. Apocrine gland

2. Melanocyte

3. Sebaceous gland

4. Sudoriferous gland

The correct answer is: Sebaceous gland

The sebaceous gland is responsible for the secretion of sebum, which is an oily substance that helps to lubricate and protect the skin and hair. Sebum plays a vital role in maintaining the skin's barrier function and preventing excessive dehydration. The secretion by these glands is influenced by hormonal changes, particularly during puberty, which can lead to increased oil production and conditions such as acne. Apocrine glands, on the other hand, are primarily involved in the production of sweat that is related to emotional responses and is found in specific areas such as the underarms and groin, rather than contributing to the oily layer on the skin. Melanocytes are specialized cells that produce melanin, the pigment responsible for skin color, but they do not secrete sebum. Sudoriferous glands are sweat glands that help regulate body temperature through sweat but do not contribute to the oily coating created by sebaceous glands. This distinction helps clarify the unique role of the sebaceous gland in skin health and maintenance.