Which of the following is the opening in the center of the iris that permits light to enter and continue on to the lens and retina?

A patient is post-op for a triple coronary artery bypass graft. In the recovery unit the respiratory therapist notices a steady decrease in SVO2 while SaO2 remains unchanged at 96%. The patient is receiving oxygen by high-flow mask at 40%. Which of the following can be concluded?

A. Oxygen consumption at the tissue level is decreasing. B. FIO2 is excessive and should be decreased. C. Cardiac output is reduced. D. PvO2 is increasing.

The metabolism that creates large amounts of carbon dioxide and lactic acid but generates little energy is called:

A) homeostatic. B) hyperoxic. C) aerobic. D) anaerobic.