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lara [203]
3 years ago
9

In a hypothetical study, the investigator wants to look at the association between exposure to pesticides in the workplace and t

he development of asthma. The investigator selects a large group of individuals who work on PLTW farms across the country and follow them over ten years to determine who develops asthma. Of the 318 individuals exposed to pesticides, 69 develop asthma. 990 individuals worked in areas that were free of exposure to pesticides. 903 are asthma-free after ten years.
Required:
Is the hypothetical study a prospective or retrospective cohort study? Explain your answer.
Health
1 answer:
AleksandrR [38]3 years ago
7 0

Answer:

Prospective cohort study

Explanation:

Prospective cohort study is a type of observational study in epidemiology, where the subjects of the study are followed and monitored by the researcher over time, so as to investigate their risk or susceptibility to the disease. This is unlike the retrospective study where the researcher refers back in time to archived data.

The experiment described above is a prospective cohort study because the researcher follows the participants (the workers) over a span of time (ten years). At the end, he tried to evaluate the association between the exposure to the pesticide and the disease.

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Answer:

lose their ability to proliferate once development of the nervous system is complete

Explanation:

<u>The nervous system is a very essential system in a person's body</u>. It starts developing from the first trimester of pregnancy and becomes fully developed during the woman's third trimester of pregnancy until the fetus is born. <u>Thus, anything that happens during or after the woman's pregnancy may affect the infant's brain development. </u>

In the situation above, the baby was born with facial nerve paralysis. This is a condition which causes some problems to the newborn, such as <em>uncontrollable facial movements</em>. It could be a result of trauma to the facial nerve. <u>The trauma can happen before or after birth. </u>

Remember that once the nervous system is complete, it cannot repair or proliferate anymore. This makes the cells in the nervous system different from all the other cells in the human body. In the case above, the infant permanently lost his ability to have a functioning facial nerve.  

Thus, this explains the answer.

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