From a public health perspective, how is the term "obesity" defined?
An abnormally high storage of glucose in the liver and muscles
An increase in lean muscle mass relative to height
An excessive accumulation of body fat that may impair health
A temporary increase in total body water and fluid retention
The Correct Answer is C
A. Excess glucose storage in the liver and muscles is not the defining feature of obesity. While glucose is stored as glycogen, it represents a small portion of energy reserves compared to body fat.
B. An increase in lean muscle mass relative to height may increase body weight, but it does not constitute obesity, which is specifically related to excessive body fat rather than muscle.
C. Obesity is defined as an excessive accumulation of body fat that may impair health. It is commonly assessed using body mass index (BMI), waist circumference, and body fat percentage. Obesity increases the risk of chronic diseases such as type 2 diabetes, cardiovascular disease, hypertension, and certain cancers. Public health guidelines emphasize prevention and management through diet, physical activity, and lifestyle interventions.
D. Temporary increases in total body water or fluid retention, such as edema, do not define obesity. These changes are transient and not related to the long-term accumulation of fat.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. The digestive system can be affected by lead exposure, potentially causing abdominal pain, nausea, or constipation, but these are secondary effects. The primary and most severe damage occurs in the nervous system.
B. The muscular system may experience weakness in severe cases of lead toxicity, but muscles are not the main target of lead’s toxic effects.
C. The respiratory system is not the primary site of lead toxicity. Lead exposure typically occurs through ingestion or inhalation, but the lungs themselves are not significantly damaged in most cases.
D. Lead primarily targets the brain and central nervous system (CNS). It interferes with neurotransmitter function, disrupts neuronal signaling, and impairs myelin formation. This results in cognitive deficits, learning difficulties, memory loss, impaired reasoning, attention problems, and behavioral changes. Children are particularly vulnerable because their developing brains absorb lead more efficiently, and even low levels can have lasting effects on intelligence and neurodevelopment. Chronic exposure in adults can lead to mood disorders, decreased cognitive function, and peripheral neuropathy.
Correct Answer is A
Explanation
A. The “danger zone” for bacterial growth is between 40°F and 140°F (4°C–60°C). Within this temperature range, bacteria such as Salmonella, E. coli, and Listeria can multiply rapidly, increasing the risk of foodborne illness. Foods should be kept below 40°F in refrigeration or above 140°F during cooking or holding to prevent bacterial proliferation.
B. 35°F–155°F is slightly outside the standard danger zone range. Temperatures below 40°F are generally safe, and 155°F exceeds the threshold where most bacteria are destroyed.
C. 30°F–130°F is too low and does not accurately reflect the range in which bacteria multiply rapidly. Foods at 30°F are generally frozen or safe from bacterial growth.
D. 50°F–150°F does not reflect the standardized danger zone. Bacterial growth can occur at lower temperatures, starting around 40°F, and most pathogens are destroyed above 140°F.
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