Reduction in Bone Density During Adulthood Is

question 30

Multiple Choice

Reduction in bone density during adulthood is

• A)minimal.
• B)substantial.
• C)common in men but not women.
• D)common in women but very rare in men.

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Definitions:

Placenta

An organ that develops in the uterus during pregnancy, providing oxygen and nutrients to, and removing waste from, the fetus.

Trophoblast

A layer of cells surrounding the blastocyst in early development that provides nutrients to the embryo and develops into part of the placenta.

Inner Cell Mass

The inner cell mass is a group of cells inside the primordial embryo that will eventually develop into the fetus.

Germ Layers

The three primary layers of cells (ectoderm, mesoderm, and endoderm) in an embryo that develop into all organs and tissues of the body.