08-25-2007, 05:55 PM
#4
A 31-year-old woman complains of a tremor that affects both hands and has become increasingly bothersome. She says that when she drinks alcohol, the tremor abates for a short period of time. Examination shows an action tremor with a frequency of eight cycles per second. There is no evidence of bradykinesia, rigidity, or postural imbalance. Appropriate therapy for the patient™s neurologic condition would include an agent that blocks
A. α1-adrenergic receptors
B. β2-adrenergic receptors
C. dopamine D2 receptors
D. histamine H2 receptors
E. muscarinic M3 receptors
#5
When an experimental anesthetized subject is treated intravenously with an agonist (drug X), it produces an increase in blood glucose level and in the force of ventricular contraction, and a pronounced decrease in peripheral resistance. Pretreatment of the subject with an antagonist (drug Y) blocks all of these effects. Drug X most likely is which agent?
A. Epinephrine
B. Isoproterenol
C. Norepinephrine
D. Phenylephrine
E. Propranolol
A 31-year-old woman complains of a tremor that affects both hands and has become increasingly bothersome. She says that when she drinks alcohol, the tremor abates for a short period of time. Examination shows an action tremor with a frequency of eight cycles per second. There is no evidence of bradykinesia, rigidity, or postural imbalance. Appropriate therapy for the patient™s neurologic condition would include an agent that blocks
A. α1-adrenergic receptors
B. β2-adrenergic receptors
C. dopamine D2 receptors
D. histamine H2 receptors
E. muscarinic M3 receptors
#5
When an experimental anesthetized subject is treated intravenously with an agonist (drug X), it produces an increase in blood glucose level and in the force of ventricular contraction, and a pronounced decrease in peripheral resistance. Pretreatment of the subject with an antagonist (drug Y) blocks all of these effects. Drug X most likely is which agent?
A. Epinephrine
B. Isoproterenol
C. Norepinephrine
D. Phenylephrine
E. Propranolol