Which of the following tasks is commonly performed by a medical assistant?

Administering injections is a task commonly performed by medical assistants as part of their routine responsibilities in a healthcare setting. Medical assistants are trained to give various types of injections, including vaccinations and other medications, under the supervision of a licensed healthcare provider. This skill is essential in supporting patient care, ensuring timely vaccinations, and managing medication administration as directed by a physician.

In contrast, performing major surgeries is outside the scope of a medical assistant's role, as such procedures require the skills of a surgeon or a surgical team. Conducting diagnostic imaging involves specialized training and is typically handled by radiologic technologists or technicians. Prescribing medication is a legal responsibility reserved for healthcare providers like physicians or nurse practitioners, who have the necessary qualifications and authority to assess patients and determine appropriate treatments. Thus, administering injections aligns perfectly with the competencies and duties of a medical assistant, differentiating it from the other tasks listed.