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Archiver > GENEALOGY-DNA > 2002-09 > 1031196752


From: "john flinn" <>
Subject: Re: [DNA] calf instinct
Date: Wed, 4 Sep 2002 20:32:32 -0700
References: <2449F3F867FBD211936600C04F68569EA3CC76@smhrimsx.mhri.med.umich.edu>


Gregg,
Wow!! Yuh shore tole me a thang er three.
John Flinn

----- Original Message -----
From: "Bonner, Gregg" <>
To: <>
Sent: Wednesday, September 04, 2002 8:57 PM
Subject: [DNA] calf instinct


> It probably has something to do with genes that produce proteins like the
> G-protein coupled receptors and others, and neurotransmitters and such.
The
> searching for a nipple is probably something like the chemical elements in
> milk having a volatility such that a sufficient quantity is received in
the
> nose of the calf AND which is also enough to cause the receptors in the
> calf's nose to pass over the transition state of the receptor and cause
the
> heterotrimeric G-proteins to dissociate, leading to a change in cAMP
levels
> which cause a change in action potential along a neuro circuit that leads
to
> the bed nucleus of the stria terminalis (or elsewhere) which causes a 3rd
> messenger to activate the release of dopamine in the nucleus accumbens
which
> causes a feedback through the motor cortex to signal to the muscle fibers
to
> contract and promote a positive feedback whereby the calf moves a little
> closer to his mother, until which point his receptors are saturated, and
the
> whole process is downregulated so that the calf stops walking at exactly
the
> time he reaches his mother.
>
> The question that has always troubled me is, what carries the instinct in
me
> so that I do not stare directly into the sun for hours on end? I never did
> stare directly into the sun for hours on end, even before the admonitions
by
> my parents and others. So there must be a
> "don't-stare-directly-into-the-sun-for-hours-on-end" gene, n'estcafe?
>
> Cheers,
>
> Gregg
>
> >An additional or side question that has been bugging me for a long time.
> What carries 'instinct' from generation to generation. How does a newborn
> calf know to stand up, walk around its mother and search for a nipple to
> nurse?
>
>
> ==============================
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