Letter G in the figure refers to the ________, which controls heart rate, blood pressure, and respiration, as well as several reflexes. 

medulla oblongata
The medulla oblongata controls heart rate, blood pressure, and respiration, as well as reflexes associated with coughing, sneezing, and vomiting.

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The valve that is located between the right atrium and the right ventricle is the:

A) aortic valve B) mitral valve C) bicuspid valve D) tricuspid valve

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Why is heme located inside a globin chain pocket surrounded by hydrophobic amino acids?

a. Protects iron from being oxidized to its ferric form b. Necessary for oxygen release to tissues c. Makes hemoglobin insoluble d. Keeps heme from being dissolved

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