A premature infant is receiving O2 via a 50% oxyhood and has a PaO2 of 43 mmHg with a PaCO2 of 40 mmHg. The RT should recommend which of the following?

Questions 11-20 come from the population biology lab simulation.

You observe an area with low Shannon diversity index values. What does this indicate about the area’s biodiversity?

Which of the following events occurs during a type I hypersensitivity reaction?

The following data are gathered during a PEEP study (FIO2 = 0.60). Based on these data, what is the optimum PEEP level? PEEP cm H2O 0 5 10 15 20 25 PaO2 mm Hg 46 54 67 73 75 74 Compliance ml/cm H2O 18 23 26 30 24 19 Systolic pressure 125 123 114 115 104 94 Diastolic pressure 90 88 83 84 76 68

All the following should be done when preparing to helicopter transport of an adult patient requiring mechanical ventilation EXCEPT

Piaget’s theory emerged from observations of this population:

Positive selection occurs during T-cell development in the thymus and is critical for functional T cells. (a) What occurs during positive selection of T-cells? Describe this process. (b) Why is this process crucial for proper T cell function? In other words, why would T cells be useless without positive selection?

In healthy individuals, oral tolerance means that low levels of antibodies against normal food components are produced.

Which of the following findings indicates clinical improvement of atelectasis?