Define anemia, and explain how it is the same or different from hypoxemia. Give examples of three different types of anemia and a brief synopsis of each kind. Is sickle cell disease a true anemia? Explain your answer. When sickle cell disease is fatal, what is the cause of death?
What will be an ideal response?
Anemia is a condition in which the blood's hemoglobin content is too low. Hypoxemia means low oxygen in blood, which could be due to an impaired respiratory system and can therefore occur independent of anemia. Because oxygen binds to hemoglobin, individuals with anemia cannot transport as much oxygen to the tissues, resulting in fatigue and weakness. This may be especially noticeable with exercise. Some major causes of anemia are summarized in Table 16.3 in the chapter. Sickle cell disease is considered an anemia because the amount of normal hemoglobin is low. Death is related to hypoxia-caused tissue damage.
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