Location and Mechanism of Action These receptors are located in several key areas, including the brainstem, platelets, and on the surface of nerve terminals themselves. Conversely, drugs like yohimbine block these receptors and are used to treat erectile dysfunction by increasing blood flow.
Alpha 2 Antiadrenergic Effects Detail
In the periphery, particularly in the gastrointestinal and urinary tracts, activation of these receptors leads to a constriction of smooth muscle. Physiological Effects in the Central Nervous System Modulation of Pain and Sedation In the brain, alpha 2 receptors influence pain perception and arousal.
While "alpha 1" receptors cause blood vessels to constrict when activated, alpha 2 receptors located in the brainstem generally lead to a decrease in sympathetic outflow. This binding signals the cell to stop releasing more norepinephrine, effectively turning down the signal.
Alpha 2 Antiadrenergic Effects Detail
For instance, when norepinephrine is released into a synapse, some of it will bind to alpha 2 receptors on the sending neuron. Clinical Applications and Medications Many prescription drugs are designed to interact with the alpha 2 pathway.
More About What does alpha 2 do
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