Thyroxine is the main hormone secreted into the bloodstream by the thyroid gland. It plays vital roles in digestion, heart and muscle function, brain development and maintenance of bones.
A singular subject is a noun or a pronoun for just one person, place, or thing. A plural subject is a noun or a pronoun that is two or more persons, places, or things. Exampl â¦ es: Singular subject: The boy came for lunch. He was hungry. Plural subject: The boys came for lunch.
Plural form subjects with a singular meaning take a singular verb. (e.g. news, measles, mumps, physics, etc. Plural form subjects with singular or plural meaning take a singular or plural verb, depending on meaning. (e.g. politics, economics, etc.) In this example, politics is a single topic; therefore, the sentence has a singular verb.