A _____________________ is a type of anesthesia in a specific area of the body by injection of anesthetic around a major nerve or group of nerves

Epithelium stands as a barrier to microbial invasion. Infection cannot occur without microbes getting past this anatomic barrier

A) First statement is true, second statement is false. B) First statement is false, second statement is true. C) Both statements are true. D) Both statements are false.

During a sleep study, which of the following monitors oxygen saturation?

a. ETCO2 c. oximeter b. co-oximeter d. thermistor