Hypothalamus doesn't release hormones into bloodstream during a stress episode.
Develop a hypothesis, make observations, analyze data, draw conclusions
B <span>when a person is on life support and doctors decide to stop life support
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Explanation:
Each hemoglobin molecule is made up of four heme groups surrounding a globin group, forming a tetrahedral structure. ... There are four iron atoms in each molecule of hemoglobin, which accordingly can bind four atoms of oxygen. Globin consists of two linked pairs of polypeptide chains.