Biology Stack Exchange is a question and answer site for biology researchers, academics, and students. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I am thinking which hormonal and chemical effects from:

  • catecholamines
  • thyroxin
  • corticosteroids
  • sex hormones
  • prostaglandins
  • Ca2+
  • Na+
  • K+

can be be regarded as metabolites i.e. intermediates or products of metabolism.

I got this question

Account for chemical and hormonal effects on the heart.

and I am thinking if I should include metabolites as a factor as

Metabolites by intrinsic autoregulative system locally

because the autoregulation of heart is very important factor in the physiology of the heart.

Can you regard some metabolites as having hormonal and chemical effects?

share|improve this question

closed as too broad by fileunderwater, Chris, Bez, The Last Word, WYSIWYG Nov 26 '14 at 4:50

There are either too many possible answers, or good answers would be too long for this format. Please add details to narrow the answer set or to isolate an issue that can be answered in a few paragraphs.If this question can be reworded to fit the rules in the help center, please edit the question.

Strictly speaking, hormones are either steroid derivatives or peptides, which transduce their effect in specific ways (e.g., diffusion into the cell to bind a target in the case of steroids, or signalling through a surface receptor for peptides). Catecholamines are neurotransmitters and not considered hormones by the classical definition. The effects can either be autocrine, paracrine or endocrine depending on the distance of action. Ions will typically affect the electrical conductivity of the myocardium and can be considered passive in nature, but ions are not metabolites. – user560 Mar 17 '14 at 0:43
up vote 2 down vote accepted

Ions are not hormones. Ions are not metabolites either.

Technically, anything that is not directly absorbed from environment but is synthesized/modified in the body is a metabolite. Even if you don't consider polypeptides as metabolites (which for some reason are not classified as metabolites in scientific parlance), all the molecules that you mention are metabolites with known biosynthetic pathways.

share|improve this answer
You are right about ions. I missed the word "chemical" in the whole discussion. – Masi Mar 16 '14 at 17:32

Not the answer you're looking for? Browse other questions tagged or ask your own question.