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 as they transmit electrical and chemical signals throughout the body. They are responsible for processing and transmitting information. The brain and spinal cord (choices A and B) are vital components of the nervous system, but neurons are the fundamental building blocks that make up these structures. Receptors (choice D) are specialized structures that detect stimuli and send signals to neurons. However, neurons are the primary cells involved in transmitting nerve impulses, making them the correct choice in this context.

Correct Answer: C

Rationale: The correct answer is C: Malignant. A malignant tumor is cancerous because it can invade nearby tissues, spread to other parts of the body, and can be life-threatening if not treated. Benign tumors (choice B) are non-cancerous and do not spread. Opportunistic (choice A) refers to infections that take advantage of weakened immune systems, not tumors. Ballistic (choice D) is unrelated to tumors.

Correct Answer: B

Rationale: The correct answer is B because not drinking fluids before surgery helps prevent vomiting and aspiration. This is crucial to reduce the risk of complications during surgery, such as aspiration pneumonia. Choices A, C, and D are incorrect because drinking more fluids, incontinence risk, and surgery success rate are not valid reasons for restricting fluids before surgery. It is important to follow pre-operative guidelines to ensure the safety and well-being of the patient.

Correct Answer: B

Rationale: The correct answer is B because assistive devices are specifically designed to help individuals perform daily activities independently. These devices aid in tasks such as dressing, grooming, eating, and mobility. They enhance the quality of life for individuals with physical limitations. Choice A is incorrect because handwashing does not typically require assistive devices. Choice C is incorrect as assistive devices are not intended for roommate adaptation. Choice D is incorrect because wheelchairs are a specific type of assistive device, but the question is asking for the general purpose of assistive devices.

Correct Answer: B

Rationale: The correct answer is B because protected health information (PHI) includes personal health information such as medical records, treatment history, insurance information, and any other information related to an individual's health care. Personal financial information falls under PHI as it is often collected for billing and insurance purposes, and is considered sensitive and private. The other choices (A, C, D) do not fall under the category of protected health information as they are not directly related to an individual's health or medical care.