Extracellular fluid contains _ abundantly.
Correct answer: C. Sodium ions
- A. Calcium ions
- B. Potassium ions
- C. Sodium ions
- D. Magensium ions
Explanation
The primary cation in the extracellular fluid (the fluid outside the cells, including blood plasma) is the sodium ion (Na+). It plays a crucial role in maintaining fluid balance and nerve impulse transmission. Potassium (K+) is the primary intracellular cation.
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About Macromolecules
Proteins are classified by shape, composition and structure, from primary amino acid sequence to secondary, tertiary and quaternary organisation, and their biological roles are linked to this structure. Enzymes are examined as protein biocatalysts, including active sites, substrate specificity, activation energy, cofactors and factors affecting activity.
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