What is a small, cone-shaped elevation at the base of the hair follicle called?

The small, cone-shaped elevation at the base of the hair follicle is known as the dermal papilla. This structure plays a crucial role in hair growth and development, as it contains a rich supply of blood vessels that nourish the hair follicle. The dermal papilla provides essential nutrients and signals that promote the production of hair cells. It is also involved in the regulation of hair cycle phases, influencing the growth and shedding of hair.

Other structures related to hair follicles serve different functions. The sebaceous gland, for example, is associated with producing sebum, the oily substance that lubricates the hair and skins but does not directly contribute to the structure of the hair follicle itself. The bulb matrix refers to the area within the hair bulb where active cell division occurs, crucial for hair growth, but it is not the cone-shaped elevation. The hair shaft is the visible part of the hair that extends beyond the skin but is not located at the base of the follicle. In summary, the dermal papilla is essential for the health and function of hair follicles, making it the correct answer.