1. In the video, the whale exhaled carbon dioxide, which is made of one carbon atom and two oxygen atoms. List two things a scientist might ask about the movement of
carbon dioxide through the whale and its surroundings.

Drag each tile to the correct box. 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. isabel's breathing rate increases. sensory receptors in the arteries detect low oxygen levels. the brain sends signals through motor neurons. sensory neurons generate an impulse. the central nervous system relays an impulse to certain brain regions.