Biological Importance of Sodium, Potassium, Magnesium and Calcium — Prelims Questions

Which of the following s-block elements is the central atom in the chlorophyll molecule, essential for photosynthesis?

Which ion is primarily responsible for the repolarization phase of an action potential in neurons?

Which of the following is NOT a primary biological function of Calcium (Ca2+) ions?

A patient presents with severe muscle cramps, tremors, and cardiac arrhythmias. Which s-block ion deficiency is most likely contributing to these symptoms?

The Na+/K+ pump actively transports ions across the cell membrane. For every ATP molecule hydrolyzed, how many sodium and potassium ions are typically moved, and in which direction?

Which of the following ions is predominantly found in the intracellular fluid and is crucial for maintaining the resting membrane potential and repolarization of nerve cells?