Beta-blockers antagonize beta-1 and beta-2 receptors which are the usual targets of the sympathetic nervous system, including epinephrine and norepinephrine. This results in a decreased heart rate ...

Propranolol and metoprolol are beta-blockers taking to treat certain heart conditions. Learn more about their similarities and differences.

“There are beta 1 receptors on the heart and beta 2 receptors on the lungs,” she says. “When it comes to the receptors on the heart, when beta blockers bind to these receptors, they’re ...

Within islets, beta cells secrete insulin ... connected by intracellular and extracellular domains (Figure 2), and these receptors are targets for a diverse range of hormones, neurotransmitters ...