Electrolyte Imbalances Overview

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Questions and Answers

What is the term used to describe a blood sodium level below 136 mEq/L?

  • Hyponatremia (correct)
  • Hyperkalemia
  • Hypokalemia
  • Hypernatremia

What is the Latin word for sodium?

  • Potassium
  • Magnesium
  • Calcium
  • Natrium (correct)

Which of these conditions can lead to hypernatremia?

  • Overuse of salt tablets (correct)
  • Massive infusion of IV fluids containing 5% dextrose in water
  • Excessive antidiuretic hormone production
  • Excessive loss of salt due to burns

Which of the following is NOT a potential cause of hyponatremia?

<p>Overuse of salt tablets (C)</p> Signup and view all the answers

What condition is characterized by a relative deficit of water to salt in the extracellular fluid (ECF)?

<p>Hypernatremia (D)</p> Signup and view all the answers

What is the blood concentration level that defines hypernatremia?

<blockquote> <p>145 mEq/L (D)</p> </blockquote> Signup and view all the answers

What outcome can severe hyponatremia lead to?

<p>Coma and death (B)</p> Signup and view all the answers

What is the clinical term for a blood potassium level exceeding 5.1 mEq/L?

<p>Hyperkalemia (C)</p> Signup and view all the answers

Which of the following outcomes is associated with hyperkalemia?

<p>Cardiac arrest (A)</p> Signup and view all the answers

What potassium level defines hypokalemia?

<p>Below 3.5 mEq/L (B)</p> Signup and view all the answers

What effect does hypercalcemia have on muscle reflexes?

<p>Diminished reflexes (B)</p> Signup and view all the answers

What is a common symptom of hypokalemia?

<p>Cardiac dysrhythmia (A)</p> Signup and view all the answers

What can cause an increase in potassium levels leading to hyperkalemia?

<p>Shift from intracellular fluid to blood (C)</p> Signup and view all the answers

What is a potential consequence of low potassium levels?

<p>Skeletal muscle weakness (B)</p> Signup and view all the answers

Which condition is NOT a cause of low potassium levels?

<p>Weight gain (A)</p> Signup and view all the answers

What is the healthy range for blood calcium levels in mg/dL?

<p>8.4 to 10.5 (D)</p> Signup and view all the answers

What may cause hypercalcemia?

<p>Kidney failure (B)</p> Signup and view all the answers

Which hormone is primarily involved in maintaining calcium homeostasis?

<p>Parathyroid hormone (C)</p> Signup and view all the answers

What is a consequence of hypocalcemia?

<p>Muscle cramps (A)</p> Signup and view all the answers

Claude Bernard significantly contributed to which concept in physiology?

<p>Homeostasis (D)</p> Signup and view all the answers

Which of the following is a side effect of hypercalcemia?

<p>Fatigue (B)</p> Signup and view all the answers

What is the definition of 'diuretic'?

<p>A substance that promotes the removal of excess sodium from the body. (B)</p> Signup and view all the answers

What is the meaning of the term 'hyponatremia'?

<p>A condition characterized by an abnormally low level of sodium in the blood. (A)</p> Signup and view all the answers

Which of the following is a potential cause of hyperkalemia?

<p>Kidney disease (B)</p> Signup and view all the answers

What is the meaning of 'turgor'?

<p>The elasticity of the skin. (D)</p> Signup and view all the answers

What is the definition of 'edema'?

<p>A condition characterized by a buildup of fluid in the body's tissues. (D)</p> Signup and view all the answers

What is the meaning of the term 'transcellular fluid'?

<p>Fluid that is found within specific compartments such as cerebrospinal fluid or synovial fluid. (A)</p> Signup and view all the answers

Flashcards

Hypernatremia

A condition where the blood sodium level is above 145 mEq/L.

Hyponatremia

A condition where the blood sodium level is below 136 mEq/L.

Causes of Hypernatremia

Hypernatremia can be caused by various factors, including excessive salt intake (e.g., salt tablets), dehydration, or prolonged diarrhea.

Causes of Hyponatremia

Hyponatremia can be caused by excess water intake, especially without electrolytes. This can happen with excessive water infusion in IV fluids or hormone imbalances that cause water retention.

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Sodium Loss and Hyponatremia

Hyponatremia can occur due to excessive sodium loss, such as through burns or certain diuretics.

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Hyperkalemia

A condition where the blood potassium level is above 5.1 mEq/L (milliequivalents per liter).

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Hypokalemia

A condition where the blood potassium level is below 3.5 mEq/L.

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Hypercalcemia

A condition where the blood calcium level is above 5.25 mEq/L.

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Hypocalcemia

A condition where the blood calcium level is below 4.2 mEq/L.

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Electrolyte Imbalances

Electrolyte imbalances refer to disruptions in the normal levels of minerals in the body's fluids.

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Extracellular Fluid (ECF)

The fluid outside of the cells, such as blood plasma.

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Homeostasis

The process of maintaining a stable internal environment within the body, despite external changes. This includes regulating fluid levels, electrolytes, temperature, and other vital factors.

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Calcium

The most abundant mineral in the body, vital for bone and teeth formation, muscle function, nerve signals, blood clotting, and numerous enzymatic reactions.

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Internal Fluid Environment

The concept that cells in our body exist within a fluid environment, vital for their survival and overall body function. Maintaining a stable internal environment is crucial for cellular health.

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Regulation of Body Functions

The main functions of the body are regulated by the interaction of the nervous and endocrine systems. These systems control vital processes like breathing, blood pressure, and hormone production.

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Constancy of the Body

Claude Bernard's prominent contribution to physiology, highlighting the importance of maintaining a stable internal environment for optimal cell function and overall body health.

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Nonelectrolyte

A substance that does not form ions in solution. It does not conduct electricity.

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Plasma

The fluid portion of the blood, containing water, electrolytes, and proteins.

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Intracellular fluid

The fluid found within the body's cells, including the cytoplasm and other intracellular fluids.

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Extracellular fluid

The fluid that exists outside of the cells, such as plasma and interstitial fluid.

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Transcellular fluid

The fluid found in specific body cavities, such as the cerebrospinal fluid and synovial fluid, with unique compositions.

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Electrolyte

A substance that dissociates into charged ions when dissolved in water. It can conduct electricity.

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Diuretic

A chemical that promotes urination and helps the body eliminate water and electrolytes.

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Edema

Swelling caused by an excess of fluid in the tissues.

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Study Notes

Electrolyte Imbalances

  • Electrolyte imbalances occur when the balance of electrolytes in the body is disrupted.
  • Imbalances can affect various bodily functions.
  • Hypernatremia: Serum sodium concentration greater than 145 mEq/L. Possible outcomes include headache, confusion, seizures, and in severe cases coma and death.
  • Hyponatremia: Serum sodium concentration below 136 mEq/L. Possible outcomes involve various symptoms like nausea, vomiting, headache, and weakness.
  • Hyperkalemia: Blood potassium concentration exceeding 5.1 mEq/L. Possible outcomes include weakening and paralysis of muscles, cardiac dysrhythmia, or arrest. This is caused by excessive intake or shift from intracellular to extracellular fluid.
  • Hypokalemia: Blood potassium concentration below 3.5 mEq/L. Outcomes might include muscle weakness, diminished reflexes and impaired cardiac conduction. This can happen due to fasting, low potassium diets, laxative abuse, and diuretics.
  • Hypercalcemia: Serum calcium concentration greater than 5.25 mEq/L. Potential outcomes include muscle weakness, diminished reflexes, cardiac dysrhythmia, muscle cramping, cardiac dysrhythmia. Increased calcium may come from vitamin D overdose or hyperparathyroidism.
  • Hypocalcemia: Serum calcium concentration below 4.2 mEq/L. Possible outcomes include muscle cramping and twitching, hyperactive reflexes, muscle spasms, and tetany. This can stem from dietary deficiencies, decreased absorption, or increased excretion.
  • These imbalances can affect various body systems, such as central nervous system function and cardiac performance. Imbalances can affect the heart's functioning causing conditions like cardiac arrest or dysrhythmias, as well as central nervous system functioning resulting potentially causing coma and death due to disrupted nerve signals.

Potassium Imbalance

  • Normal potassium levels range from 3.5 to 5.1 mEq/L.
  • Potassium imbalance can cause serious health issues.
  • Hyperkalemia can lead to muscle weakness, and paralysis up to cardiac arrest. This can stem from excessive intake or a shift of potassium from inside cells to the blood.
  • Hypokalemia can impact muscle function and lead to cardiac irregularities. Causes include fasting, fad diets low in potassium, laxative abuse, and diuretics.
  • These imbalances can have severe consequences including coma and death. Potassium imbalances can affect CNS function, potentially leading to seizures, confusion, and coma.

Sodium Imbalance

  • Sodium, known as natrium in Latin, plays a crucial role in body function.
  • Hypernatremia, characterized by elevated sodium levels, may result from excessive salt intake, dehydration, or diarrhea.
  • Hyponatremia, characterized by reduced sodium levels, often arises from water intoxication, excessive fluid intake, or insufficient salt intake.
  • Both conditions can disrupt normal body functions resulting in various symptoms such as headache, nausea, muscle weakness, and cardiac irregularities. Both can cause seizures and coma as the nerve signals are interrupted and muscles can't function normally.

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