A 19-year-old female is found unconscious by her roommate. Which organ system is primarily responsible for maintaining consciousness?

• A. Nervous system
• B. Digestive system
• C. Muscular system
• D. Integumentary system

Answer: (A)

Verified step by step guidance

1. Step 1: Begin by understanding the concept of consciousness. Consciousness is the state of being awake, aware, and responsive to stimuli. It is primarily regulated by the brain and its associated structures.
2. Step 2: Identify the organ system responsible for maintaining consciousness. The nervous system, particularly the central nervous system (CNS), plays a key role in processing sensory information, controlling motor responses, and maintaining awareness.
3. Step 3: Evaluate the other options provided in the question. The digestive system is responsible for nutrient absorption and waste elimination, the muscular system facilitates movement, and the integumentary system protects the body and regulates temperature. None of these systems directly maintain consciousness.
4. Step 4: Focus on the nervous system's components, such as the brainstem and reticular activating system (RAS), which are critical for regulating wakefulness and alertness.
5. Step 5: Conclude that the nervous system is the correct answer, as it is the primary organ system responsible for maintaining consciousness through its control of brain functions and sensory processing.