In Some Cases the Epiphyseal Plate of the Long Bones

question 74

Multiple Choice

In some cases the epiphyseal plate of the long bones of children closes too early. What might be the cause?

• A) elevated levels of sex hormones
• B) too much vitamin D in the diet
• C) osteoblast activity exceeds osteoclast activity
• D) overproduction of thyroid hormone

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Definitions:

Reaction

A process in which substances, the reactants, undergo a transformation to produce new substances, the products.

Cyclohexanone

A cyclic ketone with the formula C6H10O, characterized by a six-member ring structure with a ketone group, used as a solvent and in the production of chemicals.

Coefficient of Correlation

A statistical measure that calculates the strength of the relationship between the relative movements of two variables.

Covariance

A measure that indicates the extent to which two variables change together, showing if increases in one variable correspond to increases in another.