Theories of Aging

Question 1

Geriatricians

Answer 1

P.383
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.

Question 2

1% Theory

Answer 2

Some gerontologists accept the 1% theory that the majority of body organs lose function at the rate of 1% per year after age 30.

Question 3

THE TELOMERASE THEORY

Answer 3

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.

Question 4

SOMATIC MUTATION THEORY

Answer 4

Random mutations in body cells collect and this produces the physiologic decrements we identify as aging

Question 5

Error Theory

Answer 5

that age-related changes in cell metabolism are a programmed loss of the genetic material found in the DNA molecule

Question 6

RANDOM MUTATIONS Theory

Answer 6

As Cell mutations collect in the body, they progressively loose the ability to REPRODUCE.

Question 7

Program Theory

Answer 7

Ageing is programed into genome

Question 8

AUTOIMMUNE EXPLANATION

Answer 8

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

Question 9

ENTROPY AND AGING

Answer 9

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

Question 10

STRESS THEORY OF AGING: WEAR AND TEAR

Answer 10

Body is like a MACHINE and simply wears out.

Question 11

NEUROENDOCRINE THEORY OF AGING

Answer 11

Belief that the brain and the endocrine glands control aging, because they control many other functions.

Question 12

Failure of Collagen

Answer 12

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?

Question 13

Longevity Assurance Genes Theory.

Answer 13

aging is thought to be under the control of hormones and to be genetically based.
** There are 150 unique genetic markers that are LINKED to living LONGER LIVES**