II. Beta Receptor Effects

  1. Beta Receptor General Effects
    1. Eye
      1. Relaxes Ciliary Muscle (resulting in taut zonule fibers, flatter lens with less focusing power)
  2. Beta 1 Receptor
    1. Myocardium
      1. Increases Myocardial Contractility
      2. Increases Heart Rate
        1. Accelerates Sinoatrial Node
        2. Accelerates ectopic Pacemakers
    2. Metabolic
      1. Fat Cell Lipolysis
      2. KidneyRenin Release
  3. Beta 2 Receptor
    1. Vessel
      1. Vasodilatation
    2. Lung
      1. Bronchodilation
    3. Genitourinary and Gastrointestinal
      1. Bladder wall relaxes
      2. Pregnant Uterus relaxes
    4. Metabolic
      1. Liver Gluconeogenesis and glycogenolysis

III. Medications: Beta Adrenergics

  1. Beta Adrenergic Agonist (Beta Adrenergic Receptor)
    1. Beta Non-Specific
      1. Isoproterenol
      2. Epinephrine
    2. Beta 1 Selective
      1. Norepinephrine
      2. Dobutamine
      3. Prenalterol
    3. Beta 2 Selective (See Bronchodilator)
      1. Fenoterol
      2. Albuterol
      3. Terbutaline
      4. Metaproterenol
  2. Beta Adrenergic Antagonist
    1. Beta Non-specific
      1. Propranolol
      2. Timolol
      3. Nadolol
      4. Pindolol
    2. Beta 1 Selective
      1. Metoprolol
      2. Acebutolol
      3. Alprenolol
      4. Atenolol
      5. Esmolol
    3. Beta 2 Selective
      1. Butoxamine

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