Microbiological and Macrobiological Theories of Aging

Microbiological and macrobiological theories of aging include (1) hormonal stress theory, (2) mitochondrial theory, (3) free radial theory, (4) cellular clock theory. The hormonal stress theory is the theory that aging in the body’s hormonal system can lower resilience to stress and increase the likely-hood of diseases. The mitochondrial theory is the theory that aging is cause by the decay of mitochondria which are tiny cellular bodies that supply energy for growth and repair. Thirdly is the free radial theory which is a microbiological theory of aging that states that people age because inside their cells normal metabolism produces unstable oxygen molecules known as free radicals. These molecules ricochet around inside cells damaging DNA and other cellular structures. And finally the cellular clock theory which was founded by Leonard Hayflick states that the maximum number of times that human cells can divide is about 75 to 80 times, and as we age, our cells have less capability to divide.