WEEK 3 - BSN315 EXAM ACTUAL DETAILED QUESTIONS AND
ANSWERS WITH VERIFIED SOLUTIONS GRADED A++
Biological Theories of Aging
Theories that explain aging as a result of biological processes, divided into two main
categories: stochastic (error) theories and programmed (non-stochastic) theories. These
theories focus on the physiological changes that contribute to aging and cellular
damage over time
Wear-and-Tear Theory
A stochastic theory suggesting that cells and tissues wear out from repeated use and
exposure to environmental stressors, eventually leading to the failure of organs and
bodily systems
Free Radical Theory
Proposes that aging occurs due to accumulated damage from free radicals, which are
unstable molecules that damage cell components. Antioxidants are believed to
counteract these effects, slowing the aging process
Cross-Link Theory
Suggests that aging results from the accumulation of cross-linked proteins and DNA,
which cause cells to lose elasticity and function. This process leads to stiffness and
reduced tissue function
Neuroendocrine-Immunological Theory
, Proposes that aging is a result of changes in the neuroendocrine and immune systems,
leading to decreased hormone levels and a decline in immune function, making the
body more vulnerable to diseases
Programmed Theory
A non-stochastic theory suggesting that aging is genetically programmed and occurs
according to a biological timetable, similar to developmental processes like growth and
puberty
Telomere Theory
Suggests that aging occurs as telomeres (protective caps on the ends of chromosomes)
shorten with each cell division. Eventually, cells can no longer divide, leading to cellular
aging and death
Normal Age-Related Changes
Predictable physiological changes that occur in older adults as a result of the natural
aging process, including changes in skin elasticity, decreased bone density, and
reduced organ function
Physical Changes in the Integumentary System
Includes thinning of the epidermis, decreased collagen production, reduced sebum
production, and loss of subcutaneous fat, leading to increased susceptibility to skin
tears, bruising, and temperature sensitivity
Xerosis
A common condition in older adults characterized by dry, flaky skin due to reduced
sebaceous gland activity and decreased moisture content in the skin
Purpura
ANSWERS WITH VERIFIED SOLUTIONS GRADED A++
Biological Theories of Aging
Theories that explain aging as a result of biological processes, divided into two main
categories: stochastic (error) theories and programmed (non-stochastic) theories. These
theories focus on the physiological changes that contribute to aging and cellular
damage over time
Wear-and-Tear Theory
A stochastic theory suggesting that cells and tissues wear out from repeated use and
exposure to environmental stressors, eventually leading to the failure of organs and
bodily systems
Free Radical Theory
Proposes that aging occurs due to accumulated damage from free radicals, which are
unstable molecules that damage cell components. Antioxidants are believed to
counteract these effects, slowing the aging process
Cross-Link Theory
Suggests that aging results from the accumulation of cross-linked proteins and DNA,
which cause cells to lose elasticity and function. This process leads to stiffness and
reduced tissue function
Neuroendocrine-Immunological Theory
, Proposes that aging is a result of changes in the neuroendocrine and immune systems,
leading to decreased hormone levels and a decline in immune function, making the
body more vulnerable to diseases
Programmed Theory
A non-stochastic theory suggesting that aging is genetically programmed and occurs
according to a biological timetable, similar to developmental processes like growth and
puberty
Telomere Theory
Suggests that aging occurs as telomeres (protective caps on the ends of chromosomes)
shorten with each cell division. Eventually, cells can no longer divide, leading to cellular
aging and death
Normal Age-Related Changes
Predictable physiological changes that occur in older adults as a result of the natural
aging process, including changes in skin elasticity, decreased bone density, and
reduced organ function
Physical Changes in the Integumentary System
Includes thinning of the epidermis, decreased collagen production, reduced sebum
production, and loss of subcutaneous fat, leading to increased susceptibility to skin
tears, bruising, and temperature sensitivity
Xerosis
A common condition in older adults characterized by dry, flaky skin due to reduced
sebaceous gland activity and decreased moisture content in the skin
Purpura
