Which of the following involves the oral administration of barium and is also called an upper GI series?

When performing a subcutaneous injection, insert the needle at a __________________________________________ angle

Fill in the blank(s) with correct word

Patients undergoing positive expiratory pressure therapy must have a high enough expiratory flow to generate pressure in the range of _____ cm H2O

a. 5 to 10 c. 20 to 25 b. 10 to 20 d. 25 to 30