Melinda Sordino is the main character and narrator of Laurie Halse Anderson 's 1999 novel Speak.Her last name, Sordino, is an Italian word that can be translated as mute..oing into ninth grade at Merryweather High School, Melinda Mel Sordino goes to a party with three other friends and is raped by a senior, Andy Evans.
The Wear and Tear Theory of Aging. The wear and tear theory of aging believes that the effects of aging are caused by damage done to cells and body systems over time. Essentially, these systems wear out due to use. Once they wear out, they can no longer function correctly.
In humans, ageing represents the accumulation of changes in a human being over time, encompassing physical, psychological, and social change. Reaction time, for example, may slow with age, while knowledge of world events and wisdom may expand. DNA damage theory of ageing: Genetic damage has two types. 2  Mutations are damages to the DNA sequence, while epimutation is damage to the DNA scaffolding which regulates gene expression in the cell. 3  Both ultimately harm our health by causing abnormal gene expression.