At WwwCensus

question 14

Multiple Choice

At www.census.gov you can create a "population pyramid" for any country.These pyramids Are back-to-back histograms.This pyramid shows Mexico's 2000 female population and the Census bureau's projection for 2050.Check all that apply.

• A)The distribution of ages in 2000 is strongly skewed to the left.
• B)The distribution of ages in 2000 is strongly skewed to the right.
• C)The distribution of projected ages in 2050 is strongly skewed to the left.
• D)The distribution of projected ages in 2050 is strongly skewed to the right.
• E) The distribution of projected ages in 2050 is approximately uniform

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Definitions:

Schwann Cells

A type of glial cell in the peripheral nervous system that encircles nerve fibers, providing insulation (myelination) and enhancing signal transmission.

Oligodendroglia

Glial cells in the central nervous system that produce myelin, a substance that insulates axons to increase the speed at which neural impulses propagate.

Myelin

The fatty substance that surrounds the axon of some nerve cells, forming an insulating layer that speeds up signal transmission.

Oligodendroglial Cells

Oligodendroglial cells are a type of glial cell in the central nervous system responsible for producing and maintaining the myelin sheath, which insulates nerve fiber to enhance signal transmission.