The lethal dose, 50% kill, or LD50 best defines
a. The concentration of a substance that kills half of a group of laboratory animals to which the substance is administered during a preestablished time.
b. The limit of a concentration to which an average healthy person can be exposed to a toxic substance during an 8-hr day.
c. The amount of a substance that kills half of a group of laboratory animals to which the substance is administered during a preestablished time.
d. The maximum dosage to a substance to which workers may be exposed continuously for a time period of 15 to 30 minutes.
C
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In the Japanese management system, what does kaizen refer to?
A. Change and good B. High quality C. Ancient management techniques D. None of the above Hint: Review page 333 of Fire Service Personnel Management, 3rd Edition.
A patient with Addison's disease would present with which of the following?
A. High sodium, low potassium levels B. Low sodium, high potassium levels C. Normal sodium, low potassium levels D. Low sodium, low potassium levels