Of all the physiologic changes that occur with aging, the biggest effect on nutritional status is due to shifts in the _____.
a. endocrine system
b. musculoskeletal system
c. gastrointestinal system
d. nervous system
e. renal system
Q. 2On average, lean body mass decreases by _____ per decade from age 30 to 70.
a. 2-3
b. 5-7
c. 8-10
d. 12-13
Q. 3Programmed aging theories propose that senescence occurs because
a. the telomeres capping the ends of chromosomes become shorter with each cell division and their loss eventually stops the chromosomes from replicating.
b. mistakes in the replication of cells or buildup of damaging by-products from biologic processes eventually destroy the organism.
c. unstable oxygen, formed normally during metabolism, can damage cells by initiating reactions that break down cell membranes.
d. fast-paced living shortens one's lifespan.
Q. 4Theories of aging can be examined from two perspectives. Which of the following is considered one of these?
a. Natural selection theory
b. Wear and tear theory
c. Non-programmed aging theory
d. Caloric restriction theory
e. a and b
Q. 5Aging theories try to explain the mechanisms behind:
a. loss of physical resilience.
b. decreased resistance to disease.
c. physical and mental changes associated with aging.
d. All of the above
Q. 6The human life span is projected to be _____ years.
a. 102-104
b. 105-110
c. 110-120
d. >120
Q. 7Which of the following has NOT contributed to life expectancy rate estimates?
a. Infant mortality rates
b. Infectious and chronic diseases
c. Safe food handling
d. Gunshot wounds or car accidents
e. Childhood mortality
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