객관식
Which of the following is the driving force for the sodium-potassium pump?
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11. Nervous Tissue and Nervous System
Ions - Sodium and Potassium
객관식
What is the most abundant extracellular cation?
A
Sodium (Na+)
B
Potassium (K+)
C
Magnesium (Mg2+)
D
Calcium (Ca2+)
검증된 단계별 안내1
Understand the concept of cations: Cations are positively charged ions. In the context of physiology, they are crucial for various cellular functions.
Identify the location: The problem specifies 'extracellular,' meaning outside the cells. Different ions have different concentrations inside and outside the cells.
Recall the major extracellular cations: The primary cations found in the extracellular fluid are sodium (Na+), potassium (K+), calcium (Ca2+), and magnesium (Mg2+).
Compare the concentrations: Sodium (Na+) is known to be the most abundant cation in the extracellular fluid, playing a key role in maintaining fluid balance and nerve function.
Conclude based on physiological knowledge: Given the options, sodium (Na+) is the most abundant extracellular cation, which is essential for processes such as nerve impulse transmission and muscle contraction.
