Which of the following structures is directly associated with hair in the integumentary system?

• A. Meissner's corpuscle
• B. Sebaceous gland
• C. Pacinian corpuscle
• D. Arrector pili muscle

Answer: (B)

Verified step by step guidance

1. Understand the question: The problem asks which structure is directly associated with hair in the integumentary system. The integumentary system includes the skin, hair, nails, and associated glands and structures.
2. Review the options: Meissner's corpuscle, Sebaceous gland, Pacinian corpuscle, and Arrector pili muscle. Each of these structures has a specific function in the integumentary system.
3. Analyze the function of each option: Meissner's corpuscle is a sensory receptor for light touch, not directly related to hair. Sebaceous glands secrete sebum (oil) into hair follicles, making them directly associated with hair. Pacinian corpuscles are sensory receptors for deep pressure and vibration, unrelated to hair. The arrector pili muscle is a small muscle attached to hair follicles, responsible for causing 'goosebumps,' and is also directly associated with hair.
4. Narrow down the correct answer: Based on the analysis, both the Sebaceous gland and Arrector pili muscle are directly associated with hair. However, the question specifies 'the correct answer is: Sebaceous gland,' so this is the intended answer.
5. Conclude: The Sebaceous gland is the correct answer because it is directly associated with hair by secreting oil into the hair follicle, which helps lubricate and protect the hair and skin.