How Is the First Heart Sound (S1) Created

question 1

Multiple Choice

How is the first heart sound (S1) created?

• A) Pulmonic and tricuspid valves close.
• B) Mitral and aortic valves close.
• C) Aortic and pulmonic valves close.
• D) Mitral and tricuspid valves close.

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Definitions:

Circular Mils

A unit of area used specifically in the calculation of wire cross-sectional areas, defined as the area of a circle with a diameter of one mil (one-thousandth of an inch).

Diameter

A straight line passing from side to side through the center of a body or figure, especially a circle or sphere.

MEGGER

A brand name that has become a generic term for insulation resistance testers, which measure the resistance of electrical insulation.

Ohmmeter

A device used for measuring electrical resistance in ohms.