What is the major extracellular (EC) electrolyte in the body?
Sodium.
Potassium.
Calcium.
Magnesium.
The Correct Answer is A
Sodium is the major extracellular electrolyte in the body.
It is responsible for maintaining the extracellular fluid volume, and also for regulation of the membrane potential of cells.
Sodium is exchanged along with potassium across cell membranes as part of active transport.
Choice B is wrong because potassium is mainly an intracellular ion.
It is important for nerve and muscle function, but it is not the predominant electrolyte in the extracellular fluid.
Choice C is wrong because calcium is not the major electrolyte in the extracellular fluid.
Calcium is mostly found in bones and teeth, where it forms a mineral reserve with phosphate.
Calcium also plays a role in muscle contraction, blood clotting, and enzyme activity.
Choice D is wrong because magnesium is not the major electrolyte in the extracellular fluid.
Magnesium is mostly found in bones, where it helps to stabilize the structure of ATP2.
Magnesium also participates in enzyme reactions, nerve and muscle function, and protein synthesis.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Fluid overload, also called hypervolemia, is a condition in which the body has too much water.
It can cause edema, hypertension, shortness of breath, and cardiovascular problems.
Diuretics are medications that help the body remove excess fluid through urine.
They are commonly used to treat fluid overload caused by heart failure, kidney failure, cirrhosis, and other conditions.
Choice B is wrong because encouraging increased fluid intake would worsen the fluid overload and increase the risk of complications.
Choice C is wrong because providing a high-sodium diet would also worsen the fluid overload and increase the risk of complications.
Sodium is an electrolyte that regulates fluid balance in the body.
Excess sodium intake can cause water retention and increase blood pressure.
Choice D is wrong because elevating the affected extremities is not an appropriate intervention for fluid overload.
Elevating the extremities can help reduce swelling caused by local factors such as injury or inflammation, but it does not address the underlying cause of fluid overload.
Correct Answer is ["A","B","D"]
Explanation
These are all signs and symptoms of hypokalemia, which is a condition where the blood potassium level is too low. This can affect the function of the muscles, nerves, and heart. Therefore, the nurse would expect to find these signs and symptoms in a client with dehydration and hypokalemia.
Choice C is wrong because hyperreflexia is not a sign or symptom of hypokalemia.
Hyperreflexia is a condition where the reflexes are exaggerated or overactive.
This can be caused by conditions such as spinal cord injury, stroke, or electrolyte imbalances such as hypocalcemia or hypomagnesemia.
Whether you are a student looking to ace your exams or a practicing nurse seeking to enhance your expertise , our nursing education contents will empower you with the confidence and competence to make a difference in the lives of patients and become a respected leader in the healthcare field.
Visit Naxlex, invest in your future and unlock endless possibilities with our unparalleled nursing education contents today