Section outline

  • Tall trees with sunlight filtering through the leaves, symbolizing photosynthesis.

     

    How do trees help you breathe?
    ::树木如何帮助你呼吸?

    Recall that trees release oxygen as a byproduct of  . And you need oxygen to breathe. Do you know why? So your  cells  can perform   and make  ATP .
    ::回顾树木释放氧作为 . 的副产品。 您需要氧气呼吸。 您知道为什么吗 ? 这样您的细胞就可以运行并制作 ATP 。

    Connecting Cellular Respiration and Photosynthesis
    ::连接细胞呼吸和相光合成

    Photosynthesis and cellular respiration are connected through an important relationship. This relationship enables life to survive as we know it. The  products  of one process are the  reactants  of the other. Notice that the equation for  cellular respiration  is the direct opposite of  photosynthesis :
    ::光合作用和细胞呼吸通过一种重要的关系连接在一起。 这种关系使我们知道生命能够生存。 一个过程的产品是另一个过程的反作用器。 注意细胞呼吸的方程式与光合作用直接相反:

    • Cellular Respiration: C 6 H 12 O 6  + 6O 2  → 6CO 2  + 6H 2 O
      ::细胞呼吸:C6H12O6 + 6O2 + 6CO2 + 6H2O
    • Photosynthesis: 6CO 2  + 6H 2 O → C 6 H 12 O 6 + 6O 2
      ::光合作用: 6CO2 + 6H2O + 6H2O + C6H12O6+ 6O2

    Photosynthesis makes the  glucose  that is used in cellular respiration to make ATP. The glucose is then turned back into carbon dioxide, which is used in photosynthesis. While water is broken down to form oxygen during photosynthesis, in cellular respiration oxygen is combined with hydrogen to form water. While photosynthesis requires carbon dioxide and releases oxygen, cellular respiration requires oxygen and releases carbon dioxide. It is the released oxygen that is used by us and most other  organisms  for cellular respiration. We breathe in that oxygen, which is carried through our   to all our cells. In our cells, oxygen allows cellular respiration to proceed. Cellular respiration works best in the presence of oxygen. Without oxygen, much less ATP would be produced.
    ::光合作用使细胞呼吸中使用的葡萄糖产生ATP。 葡萄糖随后又变成二氧化碳, 并用于光合作用。 虽然水在光合作用期间分解形成氧气, 细胞呼吸氧与氢结合形成水。 虽然光合作用需要二氧化碳和释放氧气, 细胞呼吸需要氧气和释放二氧化碳。 是我们和大多数其它生物在细胞呼吸中使用的释放氧气。 我们呼吸的氧气通过我们携带到我们所有的细胞中。 在我们的细胞中, 氧气允许细胞呼吸。 在氧气存在的情况下, 细胞呼吸最有效。 没有氧气, 更不会产生ATP。

    Cellular respiration and photosynthesis are important parts of the  . The  carbon cycle  is the pathways through which carbon is recycled in the  . While cellular respiration releases carbon dioxide into the environment, photosynthesis pulls carbon dioxide out of the  atmosphere . The exchange of carbon dioxide and oxygen during photosynthesis ( Figure   ) and cellular respiration worldwide helps to keep atmospheric oxygen and carbon dioxide at stable levels.
    ::细胞呼吸和光合作用是重要的部分。碳循环是碳循环中循环利用的途径。细胞呼吸将二氧化碳释放到环境中,光合作用则将二氧化碳从大气中释放出来。光合作用(Figure)和全世界细胞呼吸期间的二氧化碳和氧的交换有助于保持大气氧和二氧化碳的稳定水平。

    The processes of photosynthesis and cellular respiration, highlighting their interconnectedness.

     

    Cellular respiration and photosynthesis are direct opposite reactions. Energy from the sun enters a plant and is converted into glucose during photosynthesis. Some of the energy is used to make ATP in the mitochondria during cellular respiration, and some is lost to the environment as heat.
    ::细胞呼吸和光合作用是直接相反的反应。太阳的能量进入植物,在光合作用期间转化成葡萄糖。有些能量用来在细胞呼吸期间在细胞细胞呼吸中制造ATP,而有些能量则作为热力消失在环境中。

    Summary
    ::摘要

    • The equation for cellular respiration is the direct opposite of photosynthesis.
      ::细胞呼吸的方程式 与光合作用完全相反
    • The exchange of carbon dioxide and oxygen thorough photosynthesis or cellular respiration worldwide helps to keep atmospheric oxygen and carbon dioxide at stable levels.
      ::全世界二氧化碳和氧气彻底光合作用或细胞呼吸的交流有助于将大气氧气和二氧化碳保持在稳定水平。

    Explore More
    ::探索更多

    Use the resource below to answer the questions that follow.
    ::利用以下资源回答以下问题。

    • Photosynthesis and Respiration  at   (3:46)
      ::3:46时的光合作用和呼吸(3:46)
    1. What is needed for photosynthesis to occur? Be specific.
      ::光合作用需要发生什么? 具体一点。
    1. What is needed for cellular respiration to occur?
      ::进行细胞呼吸需要什么?
    1. What is ATP?
      ::什么是ATP?
    1. Do autotrophs need to carry out cellular respiration? Why or why not?
      ::是否需要自发性进行细胞呼吸?为什么或为什么不能?

    Review
    ::回顾

    1. How are the equations for photosynthesis and cellular respiration related?
      ::光合作用和细胞呼吸的方程式如何相关?
    1. What keeps atmospheric oxygen and carbon dioxide at stable levels?
      ::是什么使大气氧气和二氧化碳保持在稳定水平上?