When the nerve terminal is stimulated by nerve impulses, ____ is released into the synaptic cleft.

A patient at a mountain ski resort has notable shortness of breath. She denies any past medical history and takes no medications. After applying oxygen, you realize that the key to helping this patient improve is to:

a. descend to a lower altitude. b. administer a respiratory medication by a metered-dose inhaler. c. position her in a left lateral recumbent position. d. place her in a supine position with her legs elevated.

Which of the following is a common pathogen that could cause a disruption of normal flora in a patient receiving antibiotic therapy?

a. Clostridium difficile c. Enterobacteriaceae spp. b. Pneumocystis ca-rinii d. Pseudomonas ae-ruginosa