Final answer:
The statement that audiences critically notice a speaker's nervousness is false. Speakers typically perceive their own nervousness more acutely, and audiences are more focused on the content. By effectively managing physical delivery, speakers can reduce visible nervousness and engage more with their audience.
Step-by-step explanation:
The statement is false; audiences often do not notice signs of nervousness as much as the speakers themselves believe. While it is true that public speaking can induce nervousness due to the activation of the sympathetic nervous system, audiences generally tend to be more forgiving and focused on the content being presented rather than the presenter's anxiety. Developing skills such as using gestures, eye contact, and facial expressions purposefully can help presenters manage their nervousness and connect better with their audience. Anticipating giving a public speech can stimulate the sympathetic nervous system because it triggers a stress response, commonly known as 'fight or flight mode.' This physiological reaction increases heart rate, blood pressure, and energy levels to prepare the body to deal with the perceived threat—in this case, public speaking.