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The body monitors the levels of oxygen in the blood to regulate breathing. Isabel is running in a marathon and is near the finish line. She feels out of breath. How will her nervous system work to generate a reaction? Arrange the tiles in chronological order.
1. The central nervous system relays the impulse to certain brain regions.
2. Sensory receptors in the arteries
detect low oxygen levels.
3. Isabel's breathing rate increases.
4. The brain sends signals through
motor neurons.
5. Sensory neurons generate an impulse.
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