what is methemoglobin
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- home / medterms medical dictionary a-z list / methemoglobin definition Medical Definition of Methemoglobin Methemoglobin: A form of hemoglobin that is incapable of carrying oxygen, sometimes found in the blood after certain poisonings, such as with aniline, nitrates, and other compounds. What Kind of Doctor Do I Need?
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- What is hemoglobin? Hemoglobin is the protein molecule in red blood cells that carries oxygen from the lungs to the body's tissues and returns carbon dioxide from the tissues back to the lungs. Hemoglobin is made up of four protein molecules (globulin chains) that are connected together.
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Methemoglobin Methemoglobin saturation is expressed as the percentage of hemoglobin in the methemoglobin state; That is MetHb as a proportion of Hb. 1  1-2% Normal. 2  Less than 10% metHb - No symptoms. 3  10-20% metHb - Skin discoloration only (most notably on mucous membranes) 4  20-30% metHb - Anxiety, headache, dyspnea on exertion.
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What is your hemoglobin? Answer   Hemoglobin is the protein molecule in red blood cells that carries oxygen from the lungs to the body's tissues and returns carbon dioxide from the tissues … to the lungs. The iron contained in hemoglobin is responsible for the red color of blood.   Answer   your red blood count.
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What is your hemoglobin? Answer   Hemoglobin is the protein molecule in red blood cells that carries oxygen from the lungs to the body's tissues and returns carbon dioxide from the tissues … to the lungs. The iron contained in hemoglobin is responsible for the red color of blood.
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Medical Dictionary Hemoglobin Levels Topic Guide. Hemoglobin (Levels) : Hemoglobin is the protein molecule in red blood cells that carries oxygen from the lungs, to the body 's tissues, and returns carbon monoxide from the tissues back to the lungs.
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hemoglobin HEMOGLOBIN Defined for Kids. hemoglobin. play. noun he·mo·glo·bin \ˈhē-mə-ˌglō-bən\. Definition of hemoglobin for Students. : a protein of red blood cells that contains iron and carries oxygen from the lungs to the tissues and carbon dioxide from the tissues to the lungs.
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Structural Biochemistry/Protein function/Heme group/Myoglobin Myoglobin is a protein found in muscles that binds oxygen with its heme group like hemoglobin. Heme group consists of protoporphyrin organic component and an iron atom located in its center.
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- A molecule of human hemoglobin. PolyHeme was a proposed temporary oxygen-carrying blood substitute made from human hemoglobin for emergency treatment of trauma situations where large volumes of blood are lost, with emphasis on situations where fresh blood for transfusion is not readily available.
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- Hemoglobin is the protein molecule in red blood cells that carries oxygen from the lungs to the body's tissues and returns carbon dioxide from the tissues back to the lungs.Hemoglobin is made up of four protein molecules (globulin chains) that are connected together.ach globulin chain contains an important central structure called the heme molecule. Embedded within the heme molecule is iron that is vital in transporting oxygen and carbon dioxide in our blood. The iron contained in hemoglobin is also responsible for the red color of blood.
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Structural Biochemistry/Protein function/Heme group/Myoglobin Myoglobin, an iron-containing protein in muscle, receives oxygen from the red blood cells and transports it to the mitochondria of muscle cells, where the oxygen is used in cellular respiration to produce energy.
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hemoglobin A hemoglobin molecule is composed of a protein group, known as globin, and four heme groups, each associated with an iron atom. In the lungs, each iron atom combines reversibly with a molecule of oxygen. Each hemoglobin molecule also has attached a single cysteine amino acid, which attracts nitric oxide from the lungs.
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Medical Definition of Hemoglobin Hemoglobin: The oxygen-carrying pigment and predominant protein in the red blood cells. Hemoglobin forms an unstable, reversible bond with oxygen.In its oxygenated state it is called oxyhemoglobin and is bright red. In the reduced state it is called deoxyhemoglobin and is purple-blue. Each hemoglobin molecule is made up of four heme groups surrounding a globin group.Heme contains iron and gives a red color to the molecule. Globin consists of two linked pairs of polypeptide chains.n the reduced state it is called deoxyhemoglobin and is purple-blue. Each hemoglobin molecule is made up of four heme groups surrounding a globin group. Heme contains iron and gives a red color to the molecule. Globin consists of two linked pairs of polypeptide chains.
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- Definition. A hemoglobin test measures the amount of hemoglobin in your blood. Hemoglobin is a protein in your red blood cells that carries oxygen to your body's organs and tissues and transports carbon dioxide from your organs and tissues back to your lungs.
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- Abstract. 1  Acquired or toxic methemoglobinemia is an uncommon complication of topically administered anesthetic agents in patients of all ages—but particularly in pediatric and elderly patients.
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Principles of Biochemistry/Amino acids and proteins Hemoglobin (/ˈhiːməˌɡloʊbᵻn, ˈhɛ-, -moʊ-/); also spelled haemoglobin and abbreviated Hb or Hgb, is the iron-containing oxygen-transport metalloprotein in the red blood cells of all vertebrates (with the exception of the fish family Channichthyidae) as well as the tissues of some invertebrates.
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hemoglobin test hemoglobin (Hb, Hgb) test, a blood test that measures the total amount of hemoglobin in the peripheral blood, which reflects the number of red blood cells in the blood. The test is normally performed as part of a complete blood count.
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- Methemoglobin (English: methaemoglobin) (pronounced met-hemoglobin) is a form of the oxygen-carrying metalloprotein hemoglobin, in which the iron in the heme group is in the Fe 3+ state, not the Fe 2+ of normal hemoglobin. Methemoglobin cannot bind oxygen, unlike oxyhemoglobin. It is bluish chocolate-brown in color.
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- Hemoglobin is the oxygen binding protein of red blood cells and is a globular protein with quaternary structure. Hemoglobin consists of four polypeptide subunits; 2 alpha chains and two beta chains. Hemoglobin transports oxygen in the blood from the lungs to the rest of the body.
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What is Myoglobin? In humans, myoglobin is used as an important biochemical marker for the diagnosis of myocardial infarction or heart attack. It is found in abundance in the cardiac muscles, so any damage in the heart muscles releases large amounts of myoglobin into the blood stream.
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Methemoglobinemia Definition. Methemoglobinemia is a blood disorder in which an abnormal amount of methemoglobin -- a form of hemoglobin -- is produced. Hemoglobin is the protein in red blood cells that carries and distributes oxygen to the body.efinition. Methemoglobinemia is a blood disorder in which an abnormal amount of methemoglobin -- a form of hemoglobin -- is produced. Hemoglobin is the protein in red blood cells that carries and distributes oxygen to the body.
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Glycohemoglobin (HbA1c, A1c)  [en EspaÃ±ol] Glycohemoglobin (HbA1c, A1c). Guide. A glycohemoglobin test, or hemoglobin A1c, is a blood test that checks the amount of sugar (glucose) bound to the hemoglobin in the red blood cells.When hemoglobin and glucose bond, a coat of sugar forms on the hemoglobin.lycohemoglobin (HbA1c, A1c). Guide. A glycohemoglobin test, or hemoglobin A1c, is a blood test that checks the amount of sugar (glucose) bound to the hemoglobin in the red blood cells.
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Biochemistry/Proteins/Types of Protein Hemoglobin[edit] Hemoglobin is an iron-containing protein in the red blood cells that is responsible for the transport of oxygen from the respiratory organs (i.e. lungs) to the rest of the body (i.e. the tissues). Unlike myoglobin which consists of a single polypeptide chain, hemoglobin consists of 4 polypeptide chains.
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Myoglobin Adult hemoglobin is a [α(2):β(2)] tetrameric hemeprotein found in erythrocytes where it is responsible for binding oxygen in the lung and transporting the bound oxygen throughout the body where it is used in aerobic metabolic pathways.
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Myoglobin Myoglobin (symbol Mb or MB) is an iron- and oxygen-binding protein found in the muscle tissue of vertebrates in general and in almost all mammals. It is related to hemoglobin, which is the iron- and oxygen-binding protein in blood, specifically in the red blood cells. In humans, myoglobin is only found in the bloodstream after muscle injury. It is an abnormal finding, and can be diagnostically relevant when found in blood.
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hemoglobin The definition of hemoglobin is the red iron pigment that makes red blood cells red. An example of hemoglobin is what brings oxygen from the lungs to the body's tissue. 1  YourDictionary definition and usage example. 2  The protein in the red blood cells of vertebrates that carries oxygen from the lungs to tissues and that consists of four polypeptide subunits, each of which is bound to an iron-containing heme molecule.