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.
Usage Notes. The verb following there is singular or plural according to the number of the subject that follows the verb: There is a message for you. There are patients in the waiting room. With compound subjects in which all the coordinate words are singular, a singular verb often occurs, although the plural may also be used: There was (or were) a horse and a cow in the pasture.