Fluid and Electrolyte Balance

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Fluid and Electrolyte Balance Our kidneys control fluid and electrolyte balance. Sodium and Potassium play a vital role in this process. Our bodies have built in regulation to fix any imbalance in fluid volume or osmolarity of the fluids. Again the imbalance can be from ingesting too much sodium, drinking too much water, which in turn causes us to urinate more water disturbing the correct balance of electrolytes, by not drinking enough water, dehydration, and again disrupting electrolytes by causing their concentration to increase, and loosing body fluids such as blood. We need to have a relatively equal balance of fluid intake and output daily. We get fluids through drinking water and other types of drinks; we also can get water out of the foods we consume. Our hunger and thirst tells us we need to either eat or drink. We lose fluids via the kidneys by excretion or via insensible loses from respiration, perspiration or fecal elimination. Osmolarity is as important as fluids in our body, osmalarity measure the solutes in our system, ie: Sodium, Potassium, and calcium. Together they bring us into homeostasis. ADH or Antidiuretic hormone, which is excreted from the posterior pituitary gland in the hypothalamus, controls how urine is excreted or not from the body; “interestingly enough anything that stimulates ADH secretion also stimulates thirst”. Our body’s plasma osmolarity plays a role in ADH release when water or fluids are not available or there is a problem. With an increase in plasma osmolarity our body is told to release ADH. ADH is also stimulated when Blood pressure falls. When our BP is low, our body’s fluid volume is also low, and ADH release responds to this to help our body get more fluid back into itself, to help increase BP or homeostasis. Without ADH our bodies let go of very dilute urine because it controls osmolarity by controlling

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