1) What is the main control center of the nervous system? a) The spinal cord b) The nerves c) The brain d) The senses 2) Which of the following best describes the role of nerves in the body? a) Protect from diseases b) Pump blood c) They digest food d) Carry messages 3) When you touch a hot surface and immediately pull your hand away, what is the initial "stimulus" in this process? a) Heat from surface b) Brain message c) Feeling of relief d) Sound of moving 4) How do your senses of taste and smell work together? a) Chemical receptors b) Work independently c) Same receptors d) Detect sound waves 5) What is the correct order of the "stimulus → response" process? a) Response → Brain b) Brain → Response c) Stimulus → Receptors d) Receptors → Stimulus 6) The retina in the eye is important because it... a) Focuses light b) Sends images c) Protects the eye d) Changes pupil size 7) What is the role of sense receptors? a) Gather information b) Digest food c) Move bones d) Pump blood 8) How do plants respond to their environment? a) Grow toward light b) Do not respond c) Use brain and nerves d) Respond to sound 9) Which part of the nervous system acts as a message "superhighway" between the brain and the body? a) The spinal cord b) The stomach c) The lungs d) The taste buds 10) Why is the nervous system important for other body systems? a) Breaks down food b) Gathers information c) Provides structure d) Carries oxygen

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