Concept explainers
Concept introduction: The organ system that circulates the blood and transports carbon dioxide, oxygen, and blood cells into the cells to provide nutrition to the body of an organism is called the blood system. The major two types of blood cells are red blood corpuscles (RBC) and white blood corpuscles (WBC). Red blood cells carry oxygen all over the body and remove carbon dioxide from the cells. White blood cells help to elicit immune response in the body
Answer to Problem 1CCPA
Correct answer: “A 65-year-old woman visits her physician complaining of shortness of breath and swollen ankles. Lab tests reveal that her hematocrit is 18.0 and her hemoglobin 5.8. Her blood smear shows macrocytes and her blood level of vitamin B12 is very low. It is diagnosed as pernicious anemia.” Hence, option c. is the correct answer.
Explanation of Solution
Reasons for the correct answer:
Option c. is given as “pernicious anemia”. The inability of the cells to absorb vitamin B12 leads to the lack of erythrocytes, which in turn causes pernicious anemia. This happens because of the absence of a protein called intrinsic factor. Therefore, B12 cannot be absorbed by the cells and causes pernicious anemia. Hence, option c. is the correct answer.
Reason for incorrect answer:
Option a. is given as “Aplastic anemia”. The bone marrow fails to produce the blood cells and this leads to aplastic anemia. Hence, option a. is incorrect.
Option b. is given as “Hemochromatosis”. The inherited blood disorder that causes the blood to retain excessive amounts of iron due to the disrupted regulation of iron
Hence, options a. and b. are incorrect.
The patient is diagnosed with pernicious anemia.
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Chapter 13 Solutions
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