Both phentolamine and prazosin
A: are competitive antagonist at α1 adrenergic receptors
B: have potent direct vasoconstrictor actions on vascular smooth muscle
C: enhance gastric acid secretion through a histamine -like effect
D: cause hypotension and bradycardia
E: are used chronically for the treatment of primary hypertension
A: are competitive antagonist at α1 adrenergic receptors
B: have potent direct vasoconstrictor actions on vascular smooth muscle
C: enhance gastric acid secretion through a histamine -like effect
D: cause hypotension and bradycardia
E: are used chronically for the treatment of primary hypertension
举一反三
- Which of the following is the most important approach in healing peptic ulcers? A: Neutralizing secreted gastric acid B: Blocking receptor activation of gastric acid secretion C: Inhibiting secretion of gastric acid at the proton pump D: Eradicating infection with H.pylori E: Coating the ulcer crater
- Prazosin A: is a selective reversible a1 receptor antagonist B: Doesnotadverselyaffectblood lipid (cholesterol) levels C: is associated with first-dose hypotension D: is also used for Enlargement of the prostate gland in men
- A drug combine with the receptors and show its effects, the drug is called A: partial agonist B: agonist C: noncompetitive antagonist D: competitive antagonist E: blocker
- Muscle is often divided into striated muscle (or skeletal muscle), smooth muscle and cardiac muscle. Both Smooth muscle and cardiac muscle are under voluntary control.
- Tachycardia is more common observed in phentolamine than prazosin because the former A: has some M-agonist action B: has some β1-agonist action C: blocks postsynaptic α₂-receptors D: blocks presynaptic α₂-receptors E: stimulates heart directly