What is hyperfunction theory?
The hyperfunction theory suggests that repair of molecular damage is important for long life, exactly because it is harmful from day one. But the importance of any process for viability does not imply its role in aging. For example, although DNA replication is important, it (or its abnormalities) does not drive aging.
What is quasi program?
Mammalian examples of quasi-programmed processes (or quasi-programs) include the promotion of cancer in late life by the senescence-associated secretory phenotype (SASP),15 and of atherosclerotic plaque formation by inflammation, leading to cardiovascular disease.
What is molecular damage?
Abstract. Aging at the molecular level is characterized by the progressive accumulation of molecular damage. The sources of damage act randomly through environmental and metabolically generated free radicals, through spontaneous errors in biochemical reactions, and through nutritional components.
What are the 3 biological theories of aging?
1) Wear and tear theory, where vital parts in our cells and tissues wear out resulting in ageing. 3) Cross-linking theory, according to which an accumulation of cross-linked proteins damages cells and tissues, slowing down bodily processes and thus result in ageing.
What is quasi-experiment in psychology?
Quasi-experimental research involves the manipulation of an independent variable without the random assignment of participants to conditions or orders of conditions. Among the important types are nonequivalent groups designs, pretest-posttest, and interrupted time-series designs.
What is an advantage of using a quasi-experiment?
The greatest advantages of quasi-experimental studies are that they are less expensive and require fewer resources compared with individual randomized controlled trials (RCTs) or cluster randomized trials.
Can human cells be repaired?
Cells are generally soft, squishy, and easily damaged. However, many can repair themselves after being punctured, torn, or even ripped in half when damaged due to the normal wear-and-tear of normal physiology or as a result of injury or pathology.
What is cellular damage?
Cell damage (also known as cell injury) is a variety of changes of stress that a cell suffers due to external as well as internal environmental changes. Amongst other causes, this can be due to physical, chemical, infectious, biological, nutritional or immunological factors.
What are the different types of biological theories?
Biological theories can be classified into three types: (1) those that attempt to differentiate among individuals on the basis of certain innate (i.e., those with which you are born) outward physical traits or characteristics; (2) those that attempt to trace the source of differences to genetic or hereditary …
What are examples of biological theories?
There are several well-known theories in biology, including the theory of evolution, cell theory, and germ theory.