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Creatine supplements are marketed in ethyl ester, gluconate, monohydrate, and nitrate forms. [40] Creatine supplementation for sporting performance enhancement is considered safe for short-term use but there is a lack of safety data for long term use, or for use in children and adolescents. [41] Some athletes choose to cycle on and off creatine ...
A simple means of estimating renal function is to measure pH, blood urea nitrogen, creatinine, and basic electrolytes (including sodium, potassium, chloride, and bicarbonate). As the kidney is the most important organ in controlling these values, any derangement in these values could suggest renal impairment.
Central to the physiologic maintenance of GFR is the differential basal tone of the afferent and efferent arterioles (see diagram). In other words, the filtration rate is dependent on the difference between the higher blood pressure created by vasoconstriction of the input or afferent arteriole versus the lower blood pressure created by lesser ...
Creatinine itself is produced [5] via a biological system involving creatine, phosphocreatine (also known as creatine phosphate), and adenosine triphosphate (ATP, the body's immediate energy supply). Creatine is synthesized primarily in the liver by methylation of glycocyamine (guanidino acetate, synthesized in the kidney from the amino acids ...
The idea of the creatine phosphate shuttle was suggested as an explanation for altered blood glucose levels in exercising diabetic patients. [5] The change in blood glucose levels were very similar to the alterations that would occur if a diabetic patient would receive a shot of Insulin.It was then proposed that contraction of myofibrils during rigorous exercise freed creatine which imitated ...
Diagram showing the basic physiologic mechanisms of the kidney. The renal clearance ratio or fractional excretion is a relative measure of the speed at which a constituent of urine passes through the kidneys. [1] [2] It is defined by following equation: =
Creatine requires a delivery system for cell uptake. [ citation needed ] An example is arginine alpha-ketoglutarate . [ citation needed ] Arginine alpha-ketoglutarate itself is a chemical compound that is supposed to increase the blood flow to muscles and therefore, increase nutrient delivery to muscle cells.
(A) Phosphocreatine, which is stored in muscle cells, contains a high energy bond. (B) When creatine phosphate is broken down during muscular contraction, energy is released and utilized to resynthesize ATP. Creatine phosphate (CP), like ATP, is stored in muscle cells. When it is broken down, a considerable amount of energy is released.