Final answer:
Animals get energy for their cells by eating food, which is then transformed into energy through cellular respiration. This process involves breaking down glucose in the presence of oxygen to produce energy, carbon dioxide, and water. Unlike photosynthesis in plants, animals rely on nutrient intake for energy.
Explanation:
How Do Animals Get Energy for Their Cells?
Animals, including humans, obtain energy for their cells primarily by eating food. This process is known as cellular respiration, where the body breaks down nutrients from the food to release energy.
Here's how it works:
- When an animal consumes food, the digestive system breaks it down into smaller molecules, such as glucose.
- The glucose enters the cells and undergoes cellular respiration, which typically occurs in the mitochondria.
- During cellular respiration, glucose is combined with oxygen to produce energy (ATP), carbon dioxide, and water.
In contrast, other options like capturing sunlight is a process used by plants in photosynthesis, not animals. Additionally, by sleeping and by exhaling carbon dioxide do not directly contribute to the energy needs of cells.
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