A child with persistently low serum phosphate develops bone deformities despite adequate caloric intake. Which mechanism explains why phosphate deficiency causes these skeletal effects?

💡 Explanation

Rickets results from impaired bone mineralization, therefore a child with low serum phosphate suffers impaired hydroxyapatite crystal formation in bone because phosphate is a critical component of hydroxyapatite. The bone matrix fails to mineralize properly, rather than enhanced bone resorption or altered collagen crosslinking which are related to other bone disorders.

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