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Methemoglobinemia
Methemoglobinemia (or methaemoglobinaemia) is a disorder characterized by the presence of a higher than normal level of methemoglobin (metHb, i.e., ferric [Fe3+] rather than ferrous [Fe2+] haemoglobin) in the blood. [ Methemoglobin is a form of hemoglobin that contains ferric [Fe3+] iron and has a decreased ability to bind oxygen. However, the ferric iron has an increased affinity for bound
oxygen.[1] The binding of oxygen to methemoglobin results in an increased affinity of oxygen to the three other heme sites (that are still ferrous) within the same tetrameric hemoglobin unit. This leads to an overall reduced ability of the red blood cell to release oxygen to tissues, with the associated oxygen–hemoglobin dissociation curve therefore shifted to the left. When methemoglobin concentration is elevated in red blood cells, tissue hypoxia can occur. ]
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User: Which of the following is an example of an X-linked recessive disorder? A. Methemoglobinemia B. Sickle cell disease C. Huntington disease D. Color blindness

User: Methemoglobinemia

Weegy: Methemoglobinemia (or methaemoglobinaemia) is a disorder characterized by the presence of a higher than normal level of methemoglobin (metHb, i.e., ferric [Fe3+] rather than ferrous [Fe2+] haemoglobin) in the blood. [ Methemoglobin is a form of hemoglobin that contains ferric [Fe3+] iron and has a decreased ability to bind oxygen. However, the ferric iron has an increased affinity for bound oxygen.[1] The binding of oxygen to methemoglobin results in an increased affinity of oxygen to the three other heme sites (that are still ferrous) within the same tetrameric hemoglobin unit. This leads to an overall reduced ability of the red blood cell to release oxygen to tissues, with the associated oxygen–hemoglobin dissociation curve therefore shifted to the left. When methemoglobin concentration is elevated in red blood cells, tissue hypoxia can occur. ]
Expert answered|alfred123|Points 2155|

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Asked 279 days ago|7/17/2013 6:20:29 PM
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Huntington disease
Weegy: Huntington's disease (HD) is a neurodegenerative genetic disorder that affects muscle coordination and leads to cognitive decline and psychiatric problems. It typically becomes noticeable in mid-adult life. [ HD is the most common genetic cause of abnormal involuntary writhing movements called chorea, which is why the disease used to be called Huntington's chorea. ] (More)
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Asked 279 days ago|7/17/2013 6:25:23 PM
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Which of these is happening when translation takes place? A. tRNAs are bringing amino acids to the ribosomes. B. DNA is being replicated. C. mRNA is still in the nucleus. D. rRNAs expose their anticodons. User: mitosis
Weegy: b. false User: Which one of the following statements about mitosis is correct? A. It forms two identical daughter cells. B. It creates haploid nuclei. C. It's part of the process of oogenesis. D. It consists of two parts: mitosis I and mitosis Weegy: Which one of the following statements about mitosis is correct? answer: A. It forms two identical daughter cells source: › Flashcards (More)
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Asked 279 days ago|7/17/2013 6:27:51 PM
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