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.

for many centuries there were important factors which the economies of the muslim empires developed increasingly. they applied economic procedures in production, investment, finance, taxation and property. they used to tax certain goods (for example: harvest), they charged interest on money lent, they signed contracts with merchants; they relied on a common currency, and they used checks as well as promissory notes. with the money collected by means of taxation, the government provided the needy with an income. in addition, trading networks covered huge distances, so far regions started to have contact and exchange goods. this trade network covered areas of asia, africa and europe.