Correct Answer: A

Rationale: Administering immunizations is a prime example of primary prevention in community health. Primary prevention focuses on preventing diseases before they occur by taking proactive measures such as immunizations. Immunizations help individuals develop immunity against specific diseases, reducing the likelihood of their occurrence within a community.

Correct Answer: B

Rationale: Advocating for policies that promote health equity is a crucial action for community health nurses to address health disparities. While providing health education, conducting assessments, and offering free screenings are important interventions, advocating for policies that promote health equity can have a broader and more sustainable impact on reducing health disparities within communities.

Correct Answer: C

Rationale: Parkinson's disease is a neurodegenerative disorder characterized by the loss of dopamine-producing neurons in the brain. Dopamine is a neurotransmitter responsible for coordinating smooth muscle movements. The decrease in dopamine levels leads to the motor symptoms associated with Parkinson's disease, such as tremors, rigidity, and bradykinesia. Serotonin, adrenaline, and GABA are not primarily implicated in the pathophysiology of Parkinson's disease.

Correct Answer: A

Rationale: The primary focus of public health is to prevent disease and promote health at the population level. This includes implementing interventions and policies that aim to improve the overall health of communities, rather than focusing solely on individual care or education. By addressing the root causes of health issues and promoting wellness, public health efforts strive to create healthier environments and populations.

Correct Answer: D

Rationale: Advocating for legislative changes is a policy-level intervention that can bring about significant improvements in community health. This involves influencing laws and regulations to create a healthier environment for the community as a whole, impacting a larger population than individual-level interventions. Implementing new treatment protocols, educating individuals about healthy behaviors, and establishing community health clinics are important interventions but are more focused on the individual or community level rather than policy-level changes.