Category: Physiology
Refractory period
Absolute refractory period: No stimulus, regardless of its strength, will excite the nerve. It spans from the time the firing level is reached until repolarization is approximately one-third complete. Basis:…
Membrane receptors
G Protein-Coupled Receptor (GPCR) Subtype Effect 2nd Messenger Action Gs Activates adenylate cyclase Stimulation of cAMP production Activates protein kinase A Gi Inhibits adenylate cyclase Inhibition of cAMP production Gq…