Which of the following variations control blood flow to the brain?
a. Central neural innervation
b. Circulation of humoral agents
c. Local metabolic control mechanisms
d. Local myogenic control mechanisms
ANS: C
Metabolic control involves the relationship between vascular smooth muscle tone and the level of local cellular metabolites. The vascular tone in the brain is the most sensitive to changes in the local metabolite levels, particularly those of CO2 and pH.
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The AEMT would recognize which one of the following statements as the BEST example of the use of a weapon of mass destruction?
A) Death of 49 people in a crowded mall following intentional infection with unknown bacteria. B) Death of 57 following nighttime tornadoes that have struck a suburban area. C) Accidental release of radioactive gas from a nuclear power plant that has impacted thousands of people. D) Death of 25 following an explosion in an industrial plant caused by faulty wiring.
Which of the following statements about vibrating mesh nebulizers is false?
a. They have no residual volume. b. They reduce the contamination of medica-tion in the reservoir. c. They are capable of generating aerosol from a single drop of liquid. d. They can be used in closed systems during mechanical ventilation.
Following fertilization, a zygote begins the journey to the well-prepared uterus, arriving about _____ after ovulation
A) 12 hours B) 36 hours C) 3 days D) 6 days
The final safety step during an injection procedure is to properly ________ the needle prior to disposal
Fill in the blank(s) with correct word