The colored portion of the eye that controls the size of the pupil opening is called the:

When resuscitating a newborn, which of the following devices is most appropriate?

a. Manual resuscitator bag with a minimum volume of 600 mL b. Oxygen-powered resuscitator with a 60-cm H2O pressure-release valve c. Oxygen-powered resuscitator with a 50-cm H2O pressure-release valve d. Manual resuscitator bag with a 35- to 45-cm H2O pressure-release valve

The processing tank should be cleaned at what intervals?

whenever the solutions are changed once a week every two weeks every day