<prompt> Metoprolol is preferred over Propranolol as it: September 2010Is more potent in blocking beta-1 receptorsIs more potent in blocking beta-2 receptorsIs more effective in suppressing essential tremorsImpairs exercise capacity  <response>: Ans. A: Is more potent in blocking beta-1 receptors Metoprolol is cardioselective beta blocker, more potent in blocking beta-1 than beta-2 adrenergic receptors. 