Final answer:
The medical assistant should be present during the physical examination to provide legal protection for the healthcare provider and to assist with any unexpected medical issues.
Step-by-step explanation:
The medical assistant should remain in the room during the Physical Examination to provide legal protection for the provider. This is because the physical examination is a vulnerable time for both the patient and the healthcare provider, and having a witness present can prevent misunderstandings or allegations of inappropriate behavior. It also ensures that another professional is available to assist if an unexpected medical issue arises.