What is the meaning of the term -plastin?

The term “-plastin” is derived from the Greek word “plastos,” which means formed or molded. In medical terminology, the suffix is often associated with concepts of formation or development, particularly in biological or cellular contexts. For example, “-plast” refers to a structure or substance that is involved in formation, such as in the words “cytoplast” (referring to the living part of a cell) or “osteoplast” (a cell involved in bone formation). This clearly aligns with the meaning of formation, making it the correct choice.

The other options provided differ significantly in meaning. Terms associated with protection typically use prefixes like "pro-", while "carrying" relates more to terms like "transport" or “ferre.” Surgical repair usually incorporates terms such as “-plasty,” which indicates surgical molding or shaping. Thus, the specificity of “-plastin” to formation makes it the accurate answer in the context of medical terminology.