How does hair arm leg pubic know it has been cut and start growing again
When you cut your hair, arm hair leg hair or pubic hair, it doesn't actually "know" that it has been cut. Instead, the hair follicle, which is the tiny sac that produces the hair shaft, responds to the injury by sending a signal to the body that triggers the growth of a new hair shaft.
The signal is sent through a hormone called beta-catenin, which is produced by the cells in the hair follicle. Beta-catenin binds to a receptor protein on the surface of the follicle cells, and this triggers a cascade of signaling events that ultimately leads to the growth of a new hair shaft.
The process of hair growth is a complex one, and it is not fully understood. However, we do know that hair grows in cycles. The first phase of the cycle is the anagen phase, during which the hair follicle produces a new hair shaft. The anagen phase can last for several years, and it is followed by the catagen phase, during which the hair follicle shrinks and the hair shaft is released. The final phase of the cycle is the telogen phase, during which the hair follicle is dormant. After a few months, the hair follicle will re-enter the anagen phase and begin producing a new hair shaft.
The length of the hair growth cycle varies from person to person, and it can also be affected by factors such as age, health, and genetics. In general, hair grows about half an inch per month.
Related Questions
- Does hair grow back thicker after being cut? No, hair does not grow back thicker after being cut. The thickness of hair is determined by genetics.
- Can you cut hair too short to grow back? Yes, if you cut hair too short, it may not be able to grow back. This is because the hair follicle may be damaged or destroyed.
- Does hair grow back if you pull it out? Yes, hair will grow back if you pull it out. However, it may take longer to grow back than if you had cut it.
- Does shaving make hair grow back faster? No, shaving does not make hair grow back faster. The rate of hair growth is determined by genetics.
- Is there anything you can do to make hair grow faster? There are a few things you can do to make hair grow faster, such as eating a healthy diet, getting enough sleep, and massaging your scalp.
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