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Questions and Answers
Which histamine receptor is important in producing smooth muscle contraction?
Which histamine receptor is important in producing smooth muscle contraction?
- H1 receptor (correct)
- H4 receptor
- H2 receptor
- H3 receptor
What effect does histamine have on small blood vessels?
What effect does histamine have on small blood vessels?
- Vasoconstriction
- Increased clotting
- No effect
- Vasodilation (correct)
Which receptor mediates many pathological processes including allergic rhinitis and asthma?
Which receptor mediates many pathological processes including allergic rhinitis and asthma?
- H4 receptor
- H3 receptor
- H1 receptor (correct)
- H2 receptor
What does histamine cause the vascular endothelium to release, leading to vasodilation?
What does histamine cause the vascular endothelium to release, leading to vasodilation?
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Which receptor is targeted by clinically useful drugs?
Which receptor is targeted by clinically useful drugs?
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