Explain Why Most Multicellular Organisms Use an Iron-Containing Protein for Oxygen

question 87

Essay

Explain why most multicellular organisms use an iron-containing protein for oxygen binding rather than free Fe²⁺. Your answer should include an explanation of (a) the role of heme and (b) the role of the protein itself.

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Definitions:

Emotional Labor

The process of managing feelings and expressions as part of fulfilling the emotional demands of a job role.

Fight-or-flight Response

A physiological reaction occurring in response to a perceived harmful event, attack, or threat to survival.

Relaxation Response

A physical state of deep rest in which one experiences a slower respiration and heart rate and lowered metabolism; a standard technique for reducing stress.

Role Underload Stress

Stress experienced when an individual has too few responsibilities or tasks, leading to feelings of underutilization or boredom.