What type of glands secrete sebum?

• A. Sudoriferous glands
• B. Sebaceous glands
• C. Apocrine glands
• D. Tubular glands

Answer: (B)

Sebaceous glands are responsible for secreting sebum, which is an oily substance that helps to keep the skin and hair moisturized. These glands are found all over the skin except on the palms of the hands and soles of the feet. Sebum plays a crucial role in maintaining the integrity of the skin's barrier, preventing dehydration, and providing an antibacterial function. The presence of sebum is essential for skin health, as it helps to protect against the invasion of pathogens and keeps the skin flexible.

Other types of glands mentioned, such as sudoriferous glands, primarily secrete sweat and serve functions related to thermoregulation and waste excretion rather than the production of sebum. Apocrine glands, a specific type of sudoriferous glands, are found in areas such as the axillae and groin and also do not secrete sebum. Tubular glands are a broader category that can describe different types of glands based on their shape, but they do not specifically refer to sebaceous glands or their function.