Final answer:
Camilla is likely experiencing increased levels of stress hormones epinephrine and cortisol due to her nervousness about public speaking, triggering her body's fight-or-flight response.
Step-by-step explanation:
As Camilla approaches the podium to give her first public speech, she is likely experiencing an increased level of hormones such as epinephrine and cortisol, which are typical responses of the body's fight-or-flight mechanism when under stress. This reaction is primarily facilitated by the sympathetic nervous system and the hypothalamic-pituitary-adrenal (HPA) axis. The amygdala senses the threat of public speaking and sends signals to the hypothalamus to activate the sympathetic nervous system. This leads to the release of hormones like adrenaline and cortisol, which cause physical effects such as a racing heart and excessive sweating.