Why Is the Change in Sound Made by a Passing

question 8

Multiple Choice

Why is the change in sound made by a passing train's whistle similar to the reason the pitch rises quickly in systole and drops quickly in early diastole when measuring arterial sounds?

• A) Both are explained by B-mode ultrasonography.
• B) Both involve the science of plethysmography.
• C) Both are explained by the Doppler effect.
• D) Both are explained by the science of atomic behavior in a strong magnetic field such as magnetic resonance imaging (MRI).

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Definitions:

Facilitate Performance

The process of making it easier for a system, organization, or individual to achieve its goals and improve effectiveness.

Domestic Sourcing

The practice of acquiring goods, services, or materials from suppliers located within the same country as the purchasing organization.

Offshore Sourcing

The practice of procuring goods or services from suppliers located in foreign countries, often to reduce costs or access specialized skills.

Inland Transportation

The movement of goods or people within a country's borders using land-based transportation systems like railways and roads.