Re: Student Questions

[Harry Avis]

Norepinephrine is noradrenaline and adrenaline is epinephrine. There was a copyright on the name "adrenaline" for a long time, so investigators used the other terms. Technically speaking hormones act at a distance from the place they are activated, neurotranmsitters operate in close proximity. Generally speaking, melatonin is a hormone because it acts at a distance. Noeprinephrine and epinephrine could be either. Secreted from the adrenals they act as hormones, in the brain as neurotransmitters. I don't have the citation, but I think I read recently that melatonin works at some CNS sites, and hence would be a neurotransmitter under these circumstances. Obviously difficulty arises when one tries to operationalize the terms, "at a distance" and "in close proximity", but alas, the world is inexact. For example, how many terms exist in various disciplines for hippocampus and limbic system?



Harry Avis PhD
Sierra College
[EMAIL PROTECTED]

Anything worth doing is worth doing at all

From: "Jean Edwards" <[EMAIL PROTECTED]>
Reply-To: "Teaching in the Psychological Sciences" <[EMAIL PROTECTED]>
To: "Teaching in the Psychological Sciences" <[EMAIL PROTECTED]>
Subject: Re: Student Questions
Date: Fri, 31 Jan 2003 09:58:24 -0600

Student QuestionGood morning all:

I have a couple of student-initiated questions with which I need some help. First, a student asked why most of us swing our arms as we walk.

Second, a student asked if melatonin produced by the pineal gland is considered a hormone or a neurotransmitter and another asked about norepinephrine and epinephrine, produced by the adrenal glands; again are these hormones or neurotransmitters?

And I have a question: Are norepinephrine and epinephrine also called adrenaline and noradrenaline? Is there a distinction between them?

Thanks for the info in advance. It's appreciated!!

Jean Edwards
[EMAIL PROTECTED]


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