Which Is Not True About Development of the Axial Skeleton

question 4

Multiple Choice

Which is not true about development of the axial skeleton?

• A)The sternum forms by fusion of the sternal bars.
• B)The parietal and frontal bones develop by intramembranous ossification.
• C)The sphenoid bone forms by endochondral ossification.
• D)The vertebrae form secondary ossification centers at puberty.
• E)The ribs and clavicles form from schlerotomes.

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Definitions:

P Wave

A component of an electrocardiogram (ECG) representing the depolarization of the atria preceding a heartbeat.

Sinoatrial Node

The heart's natural pacemaker, located in the right atrium, responsible for initiating the heartbeat.

Wave of Depolarization

A rapid change in electrical charge across a cell membrane, leading to nerve impulse transmission or muscle contraction.

QRS Complex

A portion of an electrocardiogram (EKG) representing the depolarization of the heart's ventricles, preceding the ventricular contraction.