Respiration is controlled by

a. chemoreceptors.
b. stretch receptors.
c. centers in the brain stem.
d. all of the above.


a

Biology & Microbiology

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Which of the following is incorrectly paired?

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The difference between normal and sickle-cell hemoglobin is based upon the

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Which of the following is NOT a parasitic

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Which of these would most likely provide energy and support for a plant cell? 

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