Certified Nursing Assistant (CNA) Practice Exam

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Prepare for the Certified Nursing Assistant Exam with practice questions and in-depth explanations. Enhance your knowledge and boost your confidence for the exam!

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What is the main function of the nervous system?

To initiate voluntary muscle movements
To carry oxygen throughout the body
To digest food and absorb nutrients
To receive process and respond to information

The correct answer is: To receive process and respond to information

The primary function of the nervous system is to receive, process, and respond to information. This complex system coordinates actions and sensory information by transmitting signals between different parts of the body. It encompasses various components, including the brain and spinal cord, which are responsible for processing sensory input, making decisions, and sending out responses to muscles and organs. While some other body systems and processes are important, such as the circulatory system's role in carrying oxygen or the digestive system's function in nutrient absorption, these do not encompass the broad and integral role of the nervous system in communication and reflex actions throughout the body. The nervous system is essential for maintaining homeostasis and enabling the body to react to changes in the environment effectively.