Which factor below has the most profound effect on the resistance in a vessel?

The Reynolds number:

Research performed within the living body of an animal or plant is referred to as:

A maximum Doppler shift is obtained when the angle between the direction of blood flow and the direction of the sound beam is ______________________.

There are no bioeffects associated with the use of diagnostic ultrasound.

What type of waveform is demonstrated in the image?

In tissues that do not contain well-defined gas bodies, no effects have been reported for mechanical index values less than approximately: (choose the best answer)

Prudent practice of sonography involves application of the ________ principle.                

Which of the following is the gold standard device for measuring the acoustic output of an ultrasound machine?

Monitoring the Acoustic Output of an ultrasound machine is extremely important when considering ________.