When We Observe the Motion of Blood Using Doppler Shift

question 12

Multiple Choice

When we observe the motion of blood using Doppler shift of ultrasound, the targets are blood cells. Which of the following best describes the method?

• A)The blood cells are moving receivers; the transducer is a stationary source.
• B)The blood cells are stationary emitters; the transducer is a moving source.
• C)The blood cells are first receivers, and then they are emitters of an echo; source and receiver are moving toward each other.
• D)The blood cells are first receivers, and then they are emitters of an echo; source and receiver are moving away from each other.

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Definitions:

Knights of Labor

A significant 19th-century labor organization in the United States that aimed to promote workers' rights.

Resistance Point

In negotiations, the resistance point is the worst outcome that a party is willing to accept before walking away from the negotiation table.

Target Point

A pre-determined objective or value that serves as a reference for performance or negotiation.

Impasse

A situation in negotiation where no progress can be made or no advancement is possible.