Final answer:
The correct answer is d. nerve receptors. Sebaceous glands, hair follicles, and nails are all accessory structures of the skin, while nerve receptors are specialized sensory structures embedded in the skin that detect touch, surface temperature, and pain.
Step-by-step explanation:
The correct answer is d. nerve receptors.
Sebaceous glands, hair follicles, and nails are all accessory structures of the skin.
Sebaceous glands are responsible for producing sebum, a lipid-rich substance that coats and waterproofs the hair and skin.
Hair follicles are the structures where hairs originate and have associated sebaceous glands, capillaries, nerve endings, and tiny muscles called arrector pili.
Nails are made of dead keratinized cells and protect the extremities of our fingers and toes.
On the other hand, nerve receptors are not derivative of the skin. They are specialized sensory structures embedded in the epidermis, dermis, and hypodermis that detect touch, surface temperature, and pain.