In this task, we ask you to elaborate the sentence without changing its general meaning. You can do so by explaining further the input sentence, using more precise wording, adding qualifiers and auxiliary information etc.

A receptor antagonist is a biological repressor molecule .
A receptor antagonist is a type of receptor ligand or drug that blocks or dampens a biological response by binding to and blocking a receptor rather than activating it like an agonist .

Jan Balstad ( born 16 November 1937 in Oslo ) is a Norwegian politician .
Jan Balstad ( born 16 November 1937 in Oslo ) is a Norwegian labour leader for the Norwegian Confederation of Trade Unions , and a politician for the Labour Party .

Population growth is the rate at which a population grows or expands .

The " population growth rate " is the rate at which the number of individuals in a population increases in a given time period , expressed as a fraction of the initial population .