<prompt> Which of the following muscles is responsible for the formation of the posterior tonsillar pillar?Stylopharyngeus.Tensor veli palatine.Palatoglossus.Palatopharyngeus.  <response>: The palatopharyngeus forms the posterior tonsillar pillar. It also functions to close off the nasopharynx and larynx during swallowing. The anterior tonsillar pillar is formed by the palatoglossus. 