When Does the Embryonic Period Officially Begin

question 32

Multiple Choice

When does the embryonic period officially begin?

• A)With the onset of cleavage
• B)At the time of implantation
• C)With the establishment of the three primary germ layers
• D)When the umbilical cord becomes functional
• E)At fertilization

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Definitions:

Testosterone

A steroid hormone produced primarily in the testes of males and the ovaries of females, playing key roles in male sexual development and both genders’ muscle and bone health.

Range of Motion

The maximal potential for movement of a joint, generally described by its range of bending and stretching.

Sarcopenia

A condition characterized by loss of skeletal muscle mass and strength, often associated with aging.

Hypertrophy

The enlargement of an organ or tissue from the increase in the size of its cells, often related to physical exercise.