Seventy-year-old Edna had never exercised much. After her doctor explained about muscle mass decline, she decided to enroll in a senior aerobics class. A year later, some of her muscle weakness appeared to have reversed itself, demonstrating
A) compensation.
B) optimization.
C) plasticity.
D) selection.
Question 2
Now that she's reached old age, Veronica's heart pumps blood slower when she swims laps in the pool than it did when she was younger. At the same time, however, it pumps a larger amount of blood with each heartbeat. Veronica's heart is demonstrating which of the following?
A) Compensation
B) Plasticity
C) Optimization
D) Selection
