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Hypokalemia is a low level of potassium (K +) in the blood serum. [1] Mild low potassium does not typically cause symptoms. [3] Symptoms may include feeling tired, leg cramps, weakness, and constipation. [1] Low potassium also increases the risk of an abnormal heart rhythm, which is often too slow and can cause cardiac arrest. [1] [3]
Potassium homeostasis denotes the maintenance of the total body potassium content, plasma potassium level, and the ratio of the intracellular to extracellular potassium concentrations within narrow limits, in the face of pulsatile intake (meals), obligatory renal excretion, and shifts between intracellular and extracellular compartments.
In many countries, food laws define specific categories of ground beef and what they can contain. For example, in the United States, beef fat may be added to hamburger but not to ground beef if the meat is ground and packaged at a USDA-inspected plant. [note 1] In the U.S., a maximum of 30% fat by weight is allowed in either hamburger or ground ...
Bovine serum albumin (BSA or "Fraction V") is a serum albumin protein derived from cows. It is often used as a protein concentration standard in lab experiments. The nickname "Fraction V" refers to albumin being the fifth fraction of the original Edwin Cohn purification methodology that made use of differential solubility characteristics of plasma proteins.
Inspected beef carcasses tagged by the USDA. Beef grading in the United States is performed by the United States Department of Agriculture's (USDA) Agricultural and Marketing Service. [3] There are eight beef quality grades, with U.S. Prime being the highest grade and U.S. Canner being the lowest grade. Beef grading is a complex process.
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Emergency lowering of potassium levels is needed when new arrhythmias occur at any level of potassium in the blood, or when potassium levels exceed 6.5 mmol/L. Several agents are used to temporarily lower K + levels. The choice depends on the degree and cause of the hyperkalemia, and other aspects of the person's condition.
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