Ion channels that open when a chemical binds to a receptor are:

Organizations responsible for water and food purity, communicable disease control, alcohol and drug abuse control, maternal health, and licensing of various health agencies are:

A. state university medical centers. B. veterans Administration hospitals. C. county hospitals. D. state public health services. E. None of the above

Digital radiography systems offer several advantages over computed radiography. Some of these include

1. lower dose. 2. ease of use. 3. immediate imaging results. 4. manipulation of the image. a. 1, 2, and 3 only b. 1, 2, and 4 only c. 2, 3, and 4 only d. 1, 2, 3, and 4