dopamine neurotransmitter receptor activity, coupled via Gs

Combining with the neurotransmitter dopamine and activating adenylate cyclase via coupling to Gs to initiate a change in cell activity.

beta-adrenergic receptor activity

Combining with epinephrine or norepinephrine to initiate a change in cell activity via activation of a G protein, with pharmacological characteristics of beta-adrenergic receptors; the activity involves transmitting the signal to the Gs alpha subunit of a heterotrimeric G protein.

obsolete adenylate cyclase-activating adrenergic receptor signaling pathway involved in positive regulation of heart rate

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.

G protein-coupled opsin signaling pathway

A G protein-coupled receptor signaling pathway that starts with an opsin being activated by a photon, and ending with the light signal being trasmitted through the synapses. The signal can be transmitted via different Galpha subunits types: Go, Gs, Gq, and Gt.