Which of the Following Describes the Curves of the Spinal

question 30

Multiple Choice

Which of the following describes the curves of the spinal column that are not present at birth (sometimes called the secondary curves) ?
I.Cervical
II.Thoracic
III.Lumbar
IV.Pelvic

• A) I and II
• B) I and III
• C) I and IV
• D) II and IV

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Definitions:

Semilunar Valves

Heart valves located at the exits of the right and left ventricles of the heart, preventing backflow of blood into the ventricles; includes the aortic and pulmonary valves.

Ventricular Diastole

is a phase of the heart cycle during which the ventricles relax and fill with blood following contraction.

Cardiac Cycle

The sequence of events that occur in the heart during one heartbeat, involving contraction and relaxation of the atria and ventricles.

Ventricular Depolarization

The electrical activity that triggers contraction of the ventricles, the heart's lower chambers, during the cardiac cycle.