Flashcards in Theories of Aging Deck (13):
Physicians who specialize in treating the elderly are called geriatricians.
Professionals who study the problems of the aging population in society, and usually are not physicians, are called gerontologists.
Some gerontologists accept the 1% theory that the majority of body organs lose function at the rate of 1% per year after age 30.
THE TELOMERASE THEORY
Cancer Cells have no LIMIT to the Amount of times they can divide.
Healthy Cells have a limit (about 50)
-Telomeres a tip at the end of a chromosome, keeps all the genes in place and ensures for replication.
The telomeres tips ware out over time.
SOMATIC MUTATION THEORY
Random mutations in body cells collect and this produces the physiologic decrements we identify as aging
that age-related changes in cell metabolism are a programmed loss of the genetic material found in the DNA molecule
RANDOM MUTATIONS Theory
As Cell mutations collect in the body, they progressively loose the ability to REPRODUCE.
Ageing is programed into genome
AUTO- = Self
The body attacks itself because as cells copy, and random mutations happen, the body progressively does not recognize these "new cells" and attacks them
ENTROPY AND AGING
**A Philosophical Theory**
In this theory, aging is an inevitable expression of the idea that closed systems, such as our bodies, tend to a state of equilibrium in which nothing more happens
STRESS THEORY OF AGING: WEAR AND TEAR
Body is like a MACHINE and simply wears out.
NEUROENDOCRINE THEORY OF AGING
Belief that the brain and the endocrine glands control aging, because they control many other functions.
Failure of Collagen
collagens is a protein fiber that distributed into the wall of the blood vessels, heart and connective tissue. Is age accompanied by a reduction in the elasticity of this protein, possibly leading to heart muscle inefficiency and, because of rigidity, to reduced cell permeability, making cell nutrition more difficult?