Nokea
Vitamin A in vegetable source is called:
- A. Retinol
- B. Carotene
- C. Panthothenic acid
- D. Calciferol
Correct Answer: B
Rationale: In vegetable sources, vitamin A is present as carotene, which is converted to retinol in the body.
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Prevalence is a
- A. Ratio
- B. Rate
- C. Proportion
- D. Mode of diseases
Correct Answer: C
Rationale: Prevalence is a proportion because it measures the number of existing cases in a population at a given time out of the total population.
Overall meteorology of geography is known as.
- A. climate
- B. global warming
- C. climate change
- D. none
Correct Answer: A
Rationale: Climate refers to the long-term average of weather conditions in a particular area.
List examples of metallic compounds that pose environmental hazards. What are some examples of health effects thought to be associated with arsenic, mercury, and lead?
- A. Arsenic: cancer; Mercury: neurotoxicity; Lead: developmental delays.
- B. Arsenic: improved digestion; Mercury: enhanced memory; Lead: stronger bones.
- C. Arsenic: weight loss; Mercury: better vision; Lead: faster reflexes.
- D. Arsenic: increased stamina; Mercury: clearer speech; Lead: heightened focus.
Correct Answer: A
Rationale: Arsenic is carcinogenic, mercury causes neurotoxicity, and lead impairs cognitive development, particularly in children.
Confidence limit can be calculated by using
- A. Mean and range
- B. Mean standard deviation
- C. Median and range deviation
- D. Median and standard
Correct Answer: B
Rationale: Confidence limits are calculated using the mean and standard deviation.
Do vital statistics become surveillance data when analyzed and disseminated?
- A. True.
- B. FALSE
Correct Answer: A
Rationale: Vital statistics become surveillance data once they are analyzed, interpreted, and used to influence public health decisions.