Final answer:
Health care aides may not necessarily work only under the direct supervision of a registered nurse; the level of supervision can vary depending on regulations and the healthcare facility's policy.
Step-by-step explanation:
The statement that health care aides may only work under the direct supervision of a registered nurse is false. Health care aides can work under various levels of supervision, depending on state or regional regulations and the policy of the healthcare facility. While they often report to and are supervised by nurses, the level of oversight can vary. Health care aides specializing in certain areas, such as those who focus on providing dialysis treatments, may require closer supervision due to the complexity and risks involved with the procedures. These responsibilities are critical and include tasks such as reviewing patient history, assessing and monitoring patients, and ensuring accurate and sterile procedures during treatment.