Final answer:
The production of new terminal hairs is primarily influenced by hormonal changes. The hair matrix, which contains a layer of basal cells, is responsible for hair creation during the anagen phase. Other hair treatments such as straightening, washing, dyeing, or perming do not directly lead to new terminal hair production.
Step-by-step explanation:
Hair Growth and Factors Affecting Terminal Hair Production
The production of new terminal hairs can be influenced by various factors, with one of the most significant being hormonal changes. Terminal hairs are the thick, long, and pigmented hairs found on our scalp, face, armpits, and pubic regions. These changes might be naturally occurring, such as those experienced during puberty, or they may be induced by medical conditions or treatments that alter hormone levels.
Hair growth cycles through three phases: the anagen (growth), catagen (transition), and telogen (resting) phases. Hair matrix within the hair follicle is responsible for the creation of new hairs during the anagen phase. This region contains a layer of basal cells that divide to produce the new hair shaft.
Other treatments like hair straightening, frequent hair washing, hair dye application, and perms, whether thermal or chemical, can influence the appearance and texture of hair but do not directly cause the production of new terminal hairs. Some may potentially cause hair damage or loss if done excessively or improperly.