Functions of epithelial glands include which of the following?

• A. Electrical signaling
• B. Secretions: Lubrication, Modify pH, Enzymes (digestion)
• C. Structural support to connective tissue
• D. Absorption of oxygen

Answer: (B)

Secretion is the primary role of epithelial glands. Epithelial glands are specialized epithelial tissues that produce and release substances, either onto body surfaces or into the digestive or vascular systems. Their outputs include lubricants like mucus, which keep surfaces moist; secretions that modify the local pH to create favorable conditions for enzymes or protect tissues; and digestive enzymes that help break down food. This combination—lubrication, pH modification, and enzymes—captures the essential glandular function.

The other ideas come from different tissue roles: electrical signaling is a hallmark of nervous tissue, not glands; structural support is the job of connective tissue; and absorbing oxygen is done by respiratory or circulatory surfaces, not by glands.