and Finch, 1995, 43). In men, the number of abnormal sperm, incidence of lower testosterone production, and incidence of impotence have been found to increase with age. Because the brain controls the pulses of testosterone, it can be said that some of these changes arise because of different signals in the brain (Ricklefs and Finch, 1995, 44). The hormonal and neuroendocrine theory collects evidence mostly from a female way of life, yet both men and women experience the aging process and many of the same characteristics that go with it. The knowledge that the process of aging is very complex can be deduced from the simple fact that there are many entirely different, yet plausible, theories of how aging works. In fact, the possibility that several of these theories are connected, or play a combined part in aging is not far fetched. Yet because the process of aging is so multifarious, just how humans complete or even begin the transition from youth to old age remains a mystery to some extent. However, with new evidence and proof supporting some of these hypotheses, opportunities for a healthier, longer life may arise. Bibliography...
