Mean life span a. has no biological limits b. is the age at death of the longest
ID: 10485 • Letter: M
Question
Mean life spana. has no biological limits
b. is the age at death of the longest lived individual in a population
c. has increased dramatically in the past 50 years in North America
d. is roughly 85 years in Canada
e. none of the above is true
The greatest number of years of useful life is lost through death among young persons living in developed nations today as a result of
a. accidents
b. infections
c. strokes
d. leukemia
e. homicide
Which of the following statements is least correct as to why the chronological age of
a human is not a good measurement of biological age
a. because humans are genetically diversified
b. there are no good aging biomarkers for humans
c. all organs in humans age at the same rate and to the same extent
d. humans are subjected to a variety of external environments
e. it is based on time only
In a longitudinal study, cholesterol levels in the blood serum of cohorts decreased with age. This is an example of
a. a period effect
b. intergenerational differences
c. selective mortality
d. interindividual differences
e. all of the above
A biological factor which may contribute to the gender gap in life expectancy would be
a. men have a genetic factor on their X chromosome which decreases their longevity
b. women have a genetic factor on their X chromosome which increases their longevity
c. estrogen in women increases the levels of LDL and protects against cardiovascular disease
d. men have a genetic factor on their Y chromosome which makes them susceptible to cardiovascular disease
e. men have a genetic factor on their Y chromosome which may decrease their longevity.
Explanation / Answer
Mean life span-------maximum life span
a. has no biological limits
b. is the age at death of the longest lived individual in a population
c. has increased dramatically in the past 50 years in North America
d. is roughly 85 years in Canada
e. none of the above is true
The greatest number of years of useful life is lost through death among young persons living in developed nations today as a result of
a. accidents
b. infections
c. strokes
d. leukemia
e. homicide
Which of the following statements is least correct as to why the chronological age of
a human is not a good measurement of biological age
a. because humans are genetically diversified
b. there are no good aging biomarkers for humans
c. all organs in humans age at the same rate and to the same extent
d. humans are subjected to a variety of external environments
e. it is based on time only
In a longitudinal study, cholesterol levels in the blood serum of cohorts decreased with age. This is an example of
a. a period effect
b. intergenerational differences
c. selective mortality
d. interindividual differences
e. all of the above
A biological factor which may contribute to the gender gap in life expectancy would be
a. men have a genetic factor on their X chromosome which decreases their longevity
b. women have a genetic factor on their X chromosome which increases their longevity
c. estrogen in women increases the levels of LDL and protects against cardiovascular disease
d. men have a genetic factor on their Y chromosome which makes them susceptible to cardiovascular disease
e. men have a genetic factor on their Y chromosome which may decrease their longevity.