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| Vitamin
Glossary |
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Vitamin
Glossary "R"
- radiation necrosis-
death of an area of tissue or bone surrounded by
healthy parts.
- receptors-special
biological structures found on cells where active
molecules such as hormones,
enzymes,
and neurotransmitters
are attached to the cell surface. The cell then
responds to the presence of the chemical in the
receptor. Loss of and/or damage to receptors is one
important event in aging.
- reduction-a
chemical reaction in which an electron is donated to
the reduced entity.
- refereed journals-scientific
journals in which a committee of scientists review
papers before they are published, checking for
adequate experimental design and whether the
experimental results support the conclusions
reached.
- reflex
sympathetic dystrophy- a chronic
condition where pain does not subside an muscle
function begins to deteriorate.
- regeneration-regrowth
of lost body cells, tissues, organs, and limbs.
- renal
insufficiency- the reduced capacity of the
kidney to perform its functions.
- retinoid-a substance
closely related chemically to vitamin
A. (Vitamin A is retinoic acid and its esters,
or retinyl alcohol.) Retinoids regulate growth of epithelial
cells (skin, lung, and gut) and are often powerful antioxidants
and cancer preventing agents. The early stages of
some epithelial cancers can be converted back into
normal tissue by some retinoids. Retinoids are also
chemically closely related to and made from carotenoids.
- RNA-ribonucleic acid,
which carries instructions from DNA
(deoxyribonucleic acid) in the nucleus to cell
polyribosomes, where proteins are made according to
the RNA instructions copied from the DNA master
version of the cell's blueprints.
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The reader is cautioned
that this is not an all-inclusive reference, but a necessarily selective
source of information intended to suggest the scope of the issue
herein.
Toll Free
Phone
1-800-578-5939
Email
rick@earthtrade.com
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