PSY313H1 Chapter Notes - Chapter 2: Programmed Cell Death, Wrinkle, Collagen
Document Summary
Hayflick organism: cells grown in laboratory c culture dishes undergo only a fixed number of division before dying, with the number of possible divisions dropping depending on the age of the donor. Human adult is only capable of 20. 1 . telomeres: tips of the chromosomes play a major role. Cross- linking: in which certain proteins in human cells interact randomly and produce molecules that are linked in such a way as to make the body stiffer. The protein is collagen body issue that reinforcing rods. Cell death appears to be a function of physiological process, the innate ability of cell to self- destruct and the ability of dying cells to trigger key processes in other cells. Right now we do not know how it works. But it may be the key to understanding how gene and physiological process interact with psychological and sociocultural forces to produce aging. We do not have an unified theory of biological an physiological aging yet.
