Final answer:
If a resident complains of sudden chest pain and shortness of breath, the nursing assistant's first action should be to call the nurse immediately.
Step-by-step explanation:
If a resident complains of sudden chest pain and shortness of breath, the nursing assistant's first action should be to call the nurse immediately. Chest pain and shortness of breath can be symptoms of a serious condition such as a heart attack or lung infection, and it is important to get the resident the appropriate medical attention as soon as possible. The nurse will be able to assess the resident's condition and provide the necessary medical intervention.