C. List all the functional locations within the cardiovascular system where pathology or dysfunction could lead to failure to activate the baroreceptor reflex upon standing. Administration of 2 mg of atropine (an antagonist of muscarinic receptors) intravenously did not result in any change in heart rate. D. Is this response normal? How can you account for this result? Isoproterenol (a -adrenergic agonist) administration resulted in her heart increasing from 60/min to 118/min. Stimulated release of catecholamines from sympathetic nerve endings (via administration of an MAOI) produce a rise in blood pressure. E. Are these responses normal? What do they tell you