The ________ cells are crude weapons that release chemicals to destroy infected cells that they encounter

The physiological phenomena that occur over intervals of approximately 24 hours are:

a. anchor time events. c. hormonal rhythms. b. second-wind responses. d. circadian rhythms.

As you arrive at a metal scrap yard for an unknown medical emergency, you observe a male patient supine on the ground with AED electrodes on his chest. The AED operator has just ordered coworkers to clear the patient because the AED is going to shock. Within seconds, the AED delivers a shock without the operator pressing a "shock" button. The AEMT should recognize what type of AED?

A) Fully automated B) Manual C) Biphasic D) Semi-automated