| 41. | Tamsulosin is relatively selective for ? 1a-adrenergic receptors, which are mainly present in the prostate.
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| 42. | It activates both ? and ? adrenergic receptors.
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| 43. | Both mitragynine and 7-HMG are ? 2-adrenergic receptors.
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| 44. | Several drug companies are working on medicines, called beta-3 adrenergic receptor agonists, that stimulate the receptor.
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| 45. | One of the genes, an alpha-2 adrenergic receptor, controls the release of norepinephrine in the heart.
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| 46. | Beta-3 adrenergic receptors are found principally in brown fat, which is especially abundant in the abdomen.
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| 47. | It is an ? 1a adrenergic receptor antagonist.
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| 48. | Since ? 2 adrenergic receptors can cause vascular smooth muscle dilation beta-blockers may cause some vasoconstriction.
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| 49. | The other, a beta-1 adrenergic receptor, locks the norepinephrine onto heart muscle cells, causing them to contract.
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| 50. | It works by blocking the beta-2-adrenergic receptor.
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