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Excretion › View

The region of the brain that detect the change in concentration of the blood

A. Hypothalamus

B. Pituitary gland

C. Optic nerve

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Circulation and Excretion › View

What happens when carbon dioxide levels increase in the blood?

A. pH increases forcing the organisms to decrease respiration rate

B. pH decreases forcing the organism to increase respiration rate

C. the stretch receptors in the lungs cause the medulla oblongata to slow breathing

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