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Quick Scroll H3 RECEPTOR AGONIST 09.26.05 (3 years ago) #1
H3RECEPTOR AGONIST CAUES-
1)INHIBITION OF H1 RECEPOR INDUCED WAKEFULNESS
2)INCREASE IN H1 MEDIATED GASTRIN SECRETION
3)INHIBITION OF H1 MEDIATED BRONCHOCONSTRICTION
4)NEGATIVE CHRONOTROPIC EFFECT ON ATRIA
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Quick Scroll 10.03.05 (3 years ago) #2
no idea..can someone give the ans?
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Quick Scroll 10.03.05 (3 years ago) #3
1) ??
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Quick Scroll 10.26.05 (3 years ago) #4
1??????????how come
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Quick Scroll 10.26.05 (3 years ago) #5
amit ahish has given 1,2,3 all as right
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Quick Scroll 11.18.05 (3 years ago) #6
Yeah. The choices 1, 2 and 3 are correct.

H3 receptors
-----------------

Agonists : alpha-methyl histamine, Imetit
Antagonists : Thioperamide, Impromidine, Burimamide.

Actions of agonists :
1. In the brain, they act presynaptically and inhibit the release of histamine, leading to sedation ( That makes choice 1 correct)
2. In lung, spleen, skin and gastric mucosa, they decrease histamine content ( That makes choice 2 correct ).
3. In the ileum and airway, they inhibit H1 mediated bronchoconstriction ( That makes choice 3 correct ).

Quite a googly, since we bother least about these H3 receptors !
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