Multiple Choice
Which is the most abundant cation in the extracellular fluid (ECF)?
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11. Nervous Tissue and Nervous System
Ions - Sodium and Potassium
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Which of the following is not a major function of sodium in the human body?
A
Regulating blood pressure
B
Maintaining fluid balance
C
Acting as a primary intracellular cation
D
Facilitating nerve impulse transmission
Verified step by step guidance1
Understand the role of sodium in the human body. Sodium is primarily an extracellular cation, meaning it is found outside of cells in the extracellular fluid.
Review the functions of sodium: Sodium is crucial for maintaining fluid balance, regulating blood pressure, and facilitating nerve impulse transmission.
Identify the incorrect statement: Sodium does not act as a primary intracellular cation. The primary intracellular cation is potassium, not sodium.
Compare the roles of sodium and potassium: Sodium is involved in extracellular activities, while potassium is involved in intracellular activities.
Conclude that the statement 'Acting as a primary intracellular cation' is not a major function of sodium, as sodium is primarily found outside cells.
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