Suppose That a Recent Study Found an Increase in Heart

question 49

Multiple Choice

Suppose that a recent study found an increase in heart and lung disease among people aged 50‑60. Further study revealed that, compared to people 20 years younger, these individuals tended to smoke more during their young adulthood, because they were not aware of the health effects of smoking at that time. This difference between individuals raised at different times is an example of

• A) the placebo effect
• B) a cross‑sectional approach
• C) a cohort effect
• D) a prospective study

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Definitions:

Enzymes

Cellular molecules that considerably quicken the tempo of almost every chemical interaction taking place within cells.

Digestion

The breakdown of food into smaller components that can be absorbed and assimilated into the body.

Physiologist

A scientist who studies the functions and mechanisms of living organisms and their parts.

Anatomist

A scientist who specializes in the study of the structure of living things.