Hyperplasia is accelerated growth that increases cell numbers when they are needed.

A. bind the hair root to the dermis:The hair root is anchored to the dermis by the hair follicle itself and connective tissue structures. The receptor does not play a role in binding or physical attachment of the hair root.

B. serve as a source for new epidermal cells for hair growth after the resting stage has passed:New epidermal cells for hair growth arise from the hair matrix at the base of the follicle. The root hair plexus is a sensory nerve ending, not a cell-generating structure.

C. allow the hair to assist in touch sensation:The hair follicle receptor, or root hair plexus, is a network of sensory nerve endings wrapped around the follicle. It detects movement of the hair, making hair an important component of the tactile sensory system.

D. cause apocrine gland secretion into the hair follicle:Apocrine gland secretion is controlled by hormonal and neural signals, but not by the root hair plexus. The plexus functions in sensation, not glandular stimulation.

A. less chance for infection:While following cleavage lines can improve wound closure, the risk of infection depends more on sterile technique and postoperative care. Cutting along cleavage lines does not directly lower infection risk.

B. greater chance of infection:Cutting parallel to cleavage lines does not increase infection risk. Infection is influenced by factors such as contamination, immune status, and surgical environment rather than incision alignment.

C. slowed healing and greater scarring:Incisions made across cleavage lines place tension on wound edges, which can slow healing and result in more prominent scars. Cutting along cleavage lines avoids this complication.

D. faster healing of the skin and less scarring:Cleavage lines (Langer’s lines) represent the natural orientation of collagen fibers in the dermis. Surgical incisions made parallel to these lines heal more quickly and with minimal scarring because they experience less tension.