Answer to Question 1
Race refers to genetic patterns, inherited characteristics, and physical traits, such as skin, hair, and eyes, shared by a unique population. In contrast, ethnicity describes the common heritagethe customs, language, history, and characteristics of a certain group.
Answer to Question 2
The sympathetic nervous system, which is responsible for initiating the fight-or-flight response, functions like a gas pedal in a car. In response to a possible threat, it provides a burst of energy so the body can respond to perceived danger.