Brice was listening to her brother's account of a frightening encounter last night. he was at home, in bed, when he heard a loud sound outside his window. his heart rate and breathing increased immediately. brice told her brother that his was what initiated this fight-or-flight response.

The correct answer is epinephrine. This is also known as adrenaline by which they function primarily in one’s cardiac output that it is possible for a person to quickly experience an improve breathing, raise a dropping blood pressure, and stimulate the heart.

where's the

intimacy, passion and commitment are the components of a interpersonal relationship emphasized in the triangular theory of love by robert sternberg.

the triangular theory of love says love can be comprehend as this componest form the vertices of a triangle.  

intimacy relates to feelings such as of closeness and connection;

passion relates the drives that brings people together, as physical attraction.

commitment relates to the being in a long-term relationship.