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From: dan@rna.UUCP (Dan Ts'o)
Newsgroups: sci.bio,sci.med
Subject: Re: Endorphins and a side issue (was: Re: HEART RATE)
Message-ID: <565@rna.UUCP>
Date: Wed, 5-Nov-86 19:51:27 EST
Article-I.D.: rna.565
Posted: Wed Nov  5 19:51:27 1986
Date-Received: Thu, 6-Nov-86 03:28:02 EST
References: <768@mtx5w.UUCP> <1154@masscomp.UUCP> <579@tekfdi.UUCP> <7841@tekecs.TEK.COM>
Reply-To: dan@rna.UUCP (Dan Ts'o)
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Organization: Rockefeller Neurobiology
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Xref: mnetor sci.bio:17 sci.med:180

In article <7841@tekecs.TEK.COM> mikes@tekecs.TEK.COM (Michael Sellers) writes:
>Here's *my* side issue:  I was recently asked why you yawn when you are
>tired.  I (somewhat smugly) replied that it was to get rid of excess

	Don't forget the socio-biology. Haven't you ever noticed that there is
a great tendency others to yawn once someone in the same room yawn. It is a
primate socio-behavioral signal for the colony to go to sleep at the same time.