SOLVED

31) Which of the following medications will block the influx of calcium ions during phase 0 of the slow potential in the heart? A) Amiodarone (Cordarone) B) Lidocaine (Xylocaine) C) Esmolol (Brevibloc) D) Digoxin (Lanoxin) 32) A significant characteristic of digitalis preparations is that they: A) Have a negative inotropic effect B) Are not prodysrhythmic drugs C) Have a positive chronotropic effect D) Have a very narrow therapeutic index 33) If a patient were exhibiting pupillary constriction, hypersalivation, bronchial wheezing, and bradycardia, you should suspect ________ of the ________ nervous system. A) Blockade, voluntary B) Stimulation, sympathetic C) Stimulation, parasympathetic D) Blockade, cholinergic 34) Which of the following diseases is characterized by hypersecretion of adrenocorticotropic hormone leading to hyperglycemia, obesity, hypertension, and electrolyte imbalances? A) Cushing’s disease B) Gigantism C) Hashimoto’s disease D) Addison’s disease 35) Which class of antidysrhythmic drugs is LEAST likely to contribute to hypotension? A) I B) II C) III D) IV 36) You are caring for a 68-year-old patient with an altered level of consciousness and reported seizure activity. You obtain a blood pressure of 244/140, a pulse of 90, and respirations of 18. Which of the following medications would be most suitable for this patient? A) Minoxidil (Loniten) B) Hydralizine (Apresoline) C) Enalapril (Vasotec) D) Nitroprusside (Nipride) 37) Which of the following statements about antibiotics is NOT true? A) Antibiotics typically achieve their therapeutic action by destroying the bacterial cell wall. B) Viruses are not susceptible to antibiotics. C) Antibiotics are generally safe and can be prescribed indiscriminately. D) An individual who has developed a resistance to one type of antibiotic will typically respond well to other antibiotics in a similar class. 38) The principal mechanism of action of Dilantin in treating status seizures is the: A) Blocking of GABA receptor sites to prevent further cellular activity in the CNS B) Influx of calcium ions through calcium channels to enhance depolarization C) Blocking of acetylcholine receptor sites at the neuromuscular junction to prevent convulsions D) Prevention of sodium ions entering the cell by closing sodium channels 39) A drug that blocks the muscarinic receptors in the peripheral nervous system would be classified as a: A) Sympathomimetic B) Sympatholytic C) Parasympathomimetic D) Parasympatholytic 40) Monoamine oxidase inhibitors (MAOIs) achieve their therapeutic effects by: A) Enhancing degradation of monoamine neurotransmitters at the synapses B) Preventing the breakdown of neurotransmitters, such as norepinephrine, in the CNS C) Enhancing the effects of monoamine oxidase at the synapse D) Blocking the norepinephrine receptor sites in the CNS