All radiographic equipment should be checked on a regular basis to ensure it is in good working condition and to check for ________

The primary function of the heart is:

a. transferring oxygen to the cells. b. pumping blood throughout the body. c. oxygenating blood in the lungs. d. maintaining the volume of blood.

Which of the following components allow surfactant to lower surface tension?

A) dipalmitoyl phosphatidylcholine (DPPC) B) phosphatidylcholine (PC) C) phospholipid D) phosphatidylglycerol (PG)