Frank is walking home from the store. He starts to cross the street, and a car speeds past him, barely missing him and honking loudly as it passes. As a result of this experience, Frank’s heart...

Frank is walking home from the store. He starts to cross the street, and a car speeds past him, barely missing him and honking loudly as it passes. As a result of this experience, Frank’s heart pounds, he is breathing faster, and he feels somewhat shaky.

(a) Which division of the nervous system is responsible for the changes in heart rate and respiration Frank has experienced?

(b) What neurotransmitters are likely released in response to this experience, and what effect will they have on Frank’s brain and body?

(c) After a while, Frank calms down. His breathing and heart rate return to normal, and he feels more settled. Which division of the nervous system is responsible for this process?