This term is obsolete.
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Definition:
OBSOLETE. An adrenergic receptor signaling pathway that contributes to an increase in frequency or rate of heart contraction. Binding of adrenalin or noradrenalin to a beta-adrenergic receptor on the surface of the signal-receiving cell results in the activation of an intracellular Gs protein. Gs activates adenylate cyclase to increase intracellular cyclic-AMP (cAMP) levels. cAMP binds directly to F-channels to allow an inward flow of sodium (known as funny current, or If current). The funny current is responsible for membrane depolarization and an increase in heart rate.
Comment:
This term was obsoleted because it represents a GO-CAM pathway.
Synonyms:
exact_synonym:
Gs-coupled adrenergic receptor signaling pathway involved in positive regulation of heart rate; adrenergic receptor signaling pathway involved in positive regulation of heart rate; adrenergic receptor signalling pathway involved in positive regulation of heart rate
narrow_synonym:
beta adrenergic receptor signaling pathway involved in positive regulation of heart rate
related_synonym:
If activation by beta-adrenergic receptor signaling pathway; activation of funny current by beta-adrenergic receptor signaling pathway; adenylate cyclase-activating cardiac adrenergic receptor signaling pathway