The test that is used to show images of the heart muscle contraction in motion using high-frequency sound waves is called

ultrasound
fluoroscopy.
electrocardiogram.
echocardiogram.

Which two levels of the spine that can undergo flexion and extension?

What advantage is the cell wall in relationship to osmotic pressure

What is the best way to use the clean water act to address the issue of dirty water and diseases that plague asmall community? a) to report the number of cases of people who havecholera symptomsb) to provide health guidelines about effects from waterborne diseases c) to enforce standards that focus on chemical dischargeinto bodies of waterd) to carry out research that investigates how dirty wateraffects human health