What is bioavailability?
The study of the adverse effects of chemical, physical, or biologic agents on people, animals, and the environment.
The amount of a contaminant that actually ends up in the systemic circulation.
The process of using medical tests such as blood or urine collection to determine if a person has been exposed to a contaminant and how much exposure they have received.
An estimate that determines a person's level of exposure to a contaminant.
The Correct Answer is B
Rationale:
A. The study of the adverse effects of chemical, physical, or biologic agents on people, animals, and the environment is incorrect because this describes toxicology, not bioavailability.
B. The amount of a contaminant that actually ends up in the systemic circulation is correct because bioavailability refers to the proportion of a substance (such as a drug, chemical, or contaminant) that enters the bloodstream and is available to have an active effect in the body. This is a key concept in pharmacology and environmental health.
C. The process of using medical tests such as blood or urine collection to determine if a person has been exposed to a contaminant and how much exposure they have received is incorrect because this describes biomonitoring, not bioavailability.
D. An estimate that determines a person's level of exposure to a contaminant is incorrect because this describes exposure assessment, which estimates contact with a contaminant, rather than the amount that actually reaches systemic circulation.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Rationale:
A. Red tag is correct. In mass-casualty or disaster triage systems, a red tag indicates a patient with life-threatening injuries that are potentially survivable if treated immediately. These patients are prioritized first for rapid assessment and intervention to save life.
B. Yellow tag is used for patients with serious but not immediately life-threatening injuries. Treatment can be delayed for a short time without significant risk of death.
C. Green tag designates patients with minor injuries, sometimes called the "walking wounded." These individuals can wait for treatment and are generally ambulatory and stable.
D. Black tag indicates patients who are deceased or have injuries so severe that survival is unlikely given the available resources. In triage, these patients are classified as expectant and may receive palliative care rather than aggressive intervention.
Correct Answer is C
Explanation
Rationale:
A. Next-door neighbor is incorrect because while neighbors may observe certain behaviors, they typically do not have consistent access to comprehensive information about a child’s health, behavior, or social risk factors, making them less reliable for identifying at-risk children.
B. Parent is incorrect because although parents provide valuable insight, they may not always recognize signs of victimization or aggressive behavior in their child, and relying solely on parental reporting can lead to underestimation of risk.
C. School nurse is correct because the school nurse regularly interacts with children in a structured environment, has access to health records, observes social interactions, and can identify early warning signs of both victimization and aggression. School nurses are uniquely positioned to help public health departments target prevention and intervention efforts effectively.
D. Pediatric primary care provider is incorrect because although they monitor children’s overall health and development, they may see the child infrequently and have limited observation of day-to-day social interactions and behaviors that indicate risk for violence in the school or community setting.
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