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As a person exercises, the carbon dioxide level in the blood increases. Which of the following systems are signaled by the nervous system to respond to this increase in carbon dioxide?

digestive and immune systems

immune and respiratory systems

circulatory and excretory systems

respiratory and circulatory systems

User Nil Pun
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Answer:

It is the immune and respiratory system

Step-by-step explanation:

Since the two systems control the lungs, veins, and the upper part of the human body.

User YaOg
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Circulatory and excretory system
User Bytefire
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