How do your arm hairs know how long to grow?

It kind of makes sense that they are only so long, so if one falls out, it grows back the same length. But if you cut, trim or singe off the hairs, they grow back to the same length… then stop.

If your hair really is just dead chitin or whatever it is… how does the start know what’s going on at the end?

This entry was posted on Monday, March 31st, 2008 at 1:53 am and is filed under Pseudo Semantics. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.