Which of the following is a primary function of the integumentary system?

• A. Regulation of blood glucose levels
• B. Protection against pathogens and dehydration
• C. Production of red blood cells
• D. Synthesis of digestive enzymes

Answer: (B)

Verified step by step guidance

1. Step 1: Begin by identifying the integumentary system and its components. The integumentary system primarily includes the skin, hair, nails, sweat glands, and sebaceous glands.
2. Step 2: Understand the primary functions of the integumentary system. These include protection against physical damage, pathogens, and dehydration, regulation of body temperature, sensory reception, and synthesis of vitamin D.
3. Step 3: Analyze each option provided in the question. For example, 'Regulation of blood glucose levels' is a function of the endocrine system, not the integumentary system.
4. Step 4: Evaluate the option 'Production of red blood cells.' This is a function of the skeletal system (specifically the bone marrow), not the integumentary system.
5. Step 5: Confirm that 'Protection against pathogens and dehydration' aligns with the primary function of the integumentary system, as it serves as a physical barrier to external threats and prevents water loss.