Changes in various measures of body size during adulthood to a great extent reflect the influence of extrinsic factors. The result is that body size among adults becomes increasingly variable across the span of adulthood and older adulthood.

Infants cannot discriminate between basic speed sounds until 2 years of age.

When do the secondary sex characteristics appear?

Which of the following are true regarding the development of balance during childhood? Select all that apply.

Extrinsic (external) factors are those influences that have only a negative effect on growth and development.

Because the brain attains 80% of its adult size in the first few postnatal years, it is particularly susceptible to extrinsic factors such as poor nutrition or a physical blow during this time.

Infants demonstrate some level of visual-auditory integration early in the first year of life.

The conduction speed of nerve impulses is aided by the development of ____________ cells that wrap themselves around the axons.

Active older adults add less fat weight than their sedentary peers with aging.

Recent research has shown that children can be at the most advanced levels of upper arm and forearm action before they routinely use trunk rotation.