Question

Write a detailed note on the theories of ageing.

Answer 1

Ageing or aging (see spelling differences) is the process of becoming older. The term refers especially to human beings, many animals, and fungi, whereas for example bacteria, perennial plants and some simple animals are potentially immortal. In the broader sense, ageing can refer to single cells within an organism which have ceased dividing (cellular senescence) or to the population of a species (population ageing).

In humans, ageing represents the accumulation of changes in a human being over time,[1] encompassing physical,psychological, and social changes. Reaction time, for example, may slow with age, while knowledge of world events and wisdom may expand. Ageing is among the greatest knownrisk factors for most human diseases:[2] of the roughly 150,000 people who die each day across the globe, about two thirds die from age-related causes.

Answer 2

Theories of ageing.

• Ageing is a phenomenon experienced by everyone on this planet.
• Our body deteriorates as our age increases, there are several age-related theories which exist in our day to day life.
• Ageing can be explained or described as a process in which a human being faces a decrease in variability and on the other hand and an increase in vulnerability.
• It means that the capacity of an individual to deal with external stresses decreases which results in one being vulnerable to sickness and disease.
• There are a few types of theories concerning ageing.
• The program theory, endocrine theory, immunology theory.
• Other theories include the "wear" and "Tear theory", the theory of living rate, cross-linking theory, and the "free radical theory".

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