Naked Science Forum

Life Sciences => Physiology & Medicine => Topic started by: ...lets split up... on 16/08/2010 13:22:06

Title: How does hair know when to stop growing?
Post by: ...lets split up... on 16/08/2010 13:22:06
i've always wondered why some hairs on your body grow to a certain length and then seem to stop growing, or at least slow down. I suspect it might work the same way a dogs coat doesn't keep growing, but if you shave a patch it grows back.

How does your body register the length of your hair? Is it maybe a sensitivity to light? How does it work?
Title: How does hair know when to stop growing?
Post by: MartinTheK on 16/08/2010 16:17:40
I must quote the late great Shel Silverstein...

My beard grows to my toes
I never wears no clothes
I wraps my hair around my bare
and down the road I goes!
Title: How does hair know when to stop growing?
Post by: RD on 16/08/2010 16:56:57
http://www.thenakedscientists.com/forum/index.php?topic=15392.msg181158#msg181158