The basic working unit of the nervous system is the

Correct Answer: C

Rationale: The correct answer is C: Neuron. Neurons are the basic working units of the nervous system because they are specialized cells that transmit information through electrical and chemical signals. Neurons have a cell body, dendrites, and an axon, allowing them to receive, process, and send signals. The brain and spinal cord are made up of neurons but are not the basic working unit. Receptors are sensory organs that detect stimuli but do not transmit signals like neurons do. Therefore, the correct choice is C because neurons are essential for communication within the nervous system.

Correct Answer: C

Rationale: The correct answer is C: Malignant. A malignant tumor is cancerous because it can invade nearby tissues and spread to other parts of the body. This term is used to describe tumors that are harmful and have the potential to be life-threatening. Incorrect choices: A: Opportunistic - This term is not related to tumor classification. Opportunistic refers to infections that occur when the immune system is weakened. B: Benign - Benign tumors are non-cancerous and do not invade nearby tissues or spread to other parts of the body. D: Ballistic - This term is unrelated to tumor classification and refers to the science of projectiles and firearms.

Correct Answer: B

Rationale: The correct answer is B: Not drinking fluids can help prevent vomiting and aspiration. Before surgery, withholding fluids can reduce the risk of aspiration, where stomach contents enter the lungs during anesthesia induction. Aspiration can lead to serious complications, such as pneumonia. Choices A, C, and D are incorrect because drinking more fluids than usual, incontinence risk, and surgery success rate are not directly related to the preoperative fasting guidelines.

Correct Answer: B

Rationale: The correct answer is B because assistive devices are designed to support individuals in performing activities of daily living, such as bathing, dressing, and eating. These devices help enhance independence and quality of life for residents with disabilities or limitations. Option A is incorrect as handwashing aids are not the primary purpose of assistive devices. Option C is incorrect as assistive devices do not assist residents in adapting to new roommates. Option D is incorrect as wheelchairs are a specific type of assistive device, but not the only purpose of assistive devices.

Correct Answer: B

Rationale: The correct answer is B because protected health information (PHI) includes personal financial information. This type of information is considered sensitive and confidential under HIPAA regulations. Choices A, C, and D are incorrect because they do not fall under the category of PHI. A resident's number of visitors, personal preferences regarding roommates, and voting history are not considered protected health information as they do not pertain to the individual's health status or medical records.