Term Name:	alpha1-adrenergic receptor activity
Synonyms:	alpha1 adrenoceptor
Definition:	Combining with epinephrine or norepinephrine to initiate a change in cell activity via activation of a G protein, with pharmacological characteristics of alpha1-adrenergic receptors; the activity involves transmitting the signal to the Gq alpha subunit of a heterotrimeric G protein.
Ontology:	GO: Molecular Function [GO:0004937]    QuickGO    AmiGO