What are APN's? Once you know that, you should be able to answer this question for your class.
The following is one of hundreds that define an APN (Google search):
The role of the advanced practice nurse is to provide preventative care, treatment, and management of acute and chronic illnesses using advanced clinical skills, diagnostic reasoning, and advanced therapeutic interventions. APNs demonstrate a high level of independence and clinical expertise in the management of diseases. APNs integrate education, research, management, leadership, and consultation into their clinical roles.