In Comparing the Volume of Blood Moved from Atria to Ventricles

question 23

Multiple Choice

In comparing the volume of blood moved from atria to ventricles when the atria contract with the volume of blood ejected from the heart when the ventricles contract, we observe that .

• A) atrial contractions move as much blood into the ventricles as ventricles eject
• B) atrial contractions move more blood into the ventricles than ventricles eject
• C) atrial contractions move less blood into the ventricles than ventricles eject

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Definitions:

Pitch Diameter

A critical dimension in thread measurement; it's the diameter of the imaginary cylinder where the thread depth equals half the pitch.

Pitch Diameter

The effective diameter of a screw thread, roughly midway between the major and minor diameters.

Diametral Pitch

A measure of tooth density in gear sets, representing the number of teeth per unit of pitch diameter.

Circular Pitch

In gear design, the distance measured along the pitch circle between corresponding points on adjacent teeth.