Read the given passageand answer question number1 to 5 that follow : Hormones are molecules that act as intercellular messengers . Theseare produced by endocrine glands in the body andare poured directly in the bloodstream which transports them to the siteofaction . In terms of chemical nature ,some of thesesteriod ,e.g., estrogens and androgens, someotherareamino acid derivatives such as epinephrineand norepinephrine. Hormones haveseveral function in the body. The help to maintain theh balanceof biologicalactivities in the body .Therole of insulin in keeping the bloodglucose level within the narrowlimits is an exampleof this function . Insulin is relased in response to the rapidrisein bloodglucoselevel . Onthe otherhand hormore glucagon tends to increase the glucose level in theblood . Thetwo hormones togetherregulate teh glucose level in the blood. Epinephrine andnorepinephrine mediate respones toexternal stimuli.Growth hormones and sex hormones play role in the grwoth and development. Thyroxineproduced in the thyroidgland is an iodinatedderivative of amino acidtyrosine. Whatis theroleof epinephrine andnorepinephrine ?