This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
[{'content': 'Which of the following term best describes the antagonism of bronchoconstrictor eﬀect (mediated at the leukotriene receptors)of  leukotrienes by terbutaline  (acting at the adrenoceptors) in a patient with asthma? \nSelect and explain. \nA. Pharmacologic antagonist, B. Partial agonist, C. Physiologic antagonist, D. Chemical antagonist', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Physiological / functional antagonism\nThe two drugs act on different receptors or by different mechanisms, but have opposite overt effects on the same physiological function. i.e. have pharmacological effects in opposite direction, e.g.\n\nHistamine and adrenaline on bronchial muscles and on BP.\nHydrochlorothiazide and amiloride on urinary K+ excretion.\nGlucagon and insulin on blood sugar level.\n\nKey Concept:\xa0\nDrugs producing opposite action by acting on diﬀerent receptors are called physiological antagonists.\nReference: Essentials of Medical Pharmacology Eighth Edition KD\xa0TRIPATHI\xa0page no 68', 'role': 'assistant'}]