Final answer:
During the admission process, a medical assistant should document the patient's concerns in the medical record.
Step-by-step explanation:
When a patient explains their chief complaint during the admission process, a medical assistant should take the action of documenting the patient's concerns in the medical record. This is important for accurate record keeping and ensuring that the healthcare team is aware of the patient's symptoms and concerns. Providing advice about temporary relief measures may not be within the medical assistant's scope of practice, and evaluating the relevance of the patient's concerns should be done by a healthcare professional.