Beta receptors ✓ Passing Score: 50% 📝 Questions: 10 🎓 Practice Quiz Welcome! This is a practice quiz to test your knowledge. Please enter your details below to participate. Your results will be emailed to you upon completion. Your Information Name * Email * Start Quiz → Question 1 of 10 1 Which subtype of beta receptor is predominantly found in the heart and mediates chronotropic and inotropic effects? * $\\\\\\\\alpha_1$ $\\\\\\\\beta_1$ $\\\\\\\\beta_2$ $\\\\\\\\{M}_2$ $\\\\\\\\beta_3$ 2 Stimulation of renal juxtaglomerular cells by $\\\\\\\\beta_1$ receptors leads to: * Inhibition of sodium reabsorption Increased release of renin Decreased blood pressure Decreased filtration rate Vasoconstriction of the afferent arteriole 3 Which of the following agents is a pure $\\\\\\\\beta$ agonist used clinically for its bronchodilatory effects? * Atenolol Albuterol (Salbutamol) Pindolol Isoproterenol Labetalol 4 Which enzyme is directly activated by the binding of a catecholamine to a $\\\\\\\\beta$ adrenergic receptor? * Phospholipase C $\\\\\\\\{Na}^+/\\\\\\\\{K}^+$-ATPase Adenylyl cyclase Tyrosine kinase Guanylyl cyclase 5 Non-selective beta-blockers, such as propranolol, exert their therapeutic effects by antagonizing which combination of receptors? * $\\\\\\\\alpha_1$ and $\\\\\\\\alpha_2$ $\\\\\\\\{M}_1$ and $\\\\\\\\{M}_2$ $\\\\\\\\beta_1$ and $\\\\\\\\alpha_1$ $\\\\\\\\beta_2$ and $\\\\\\\\beta_3$ $\\\\\\\\beta_1$ and $\\\\\\\\beta_2$ 6 A common side effect of administering a non-selective beta-blocker to a patient with asthma is: * Diuresis Increased peripheral blood flow Hypotension Bronchospasm Tachycardia 7 A patient receiving a high dose of a non-selective beta-blocker may exhibit which metabolic side effect due to $\\\\\\\\beta_2$ blockade in the liver? * Decreased triglyceride synthesis Reduced fatty acid oxidation Increased gluconeogenesis Impaired recovery from hypoglycemia Increased glycogenolysis 8 Cardioselective beta-blockers (e.g., metoprolol) preferentially target which receptor subtype at low doses? * $\\\\\\\\beta_1$ $\\\\\\\\{M}_3$ $\\\\\\\\beta_3$ $\\\\\\\\beta_2$ $\\\\\\\\alpha_1$ 9 $\\\\\\\\beta_3$ receptors are primarily associated with which physiological function? * Lipolysis in adipose tissue and thermogenesis Inhibition of insulin secretion Increased myocardial oxygen demand Vasoconstriction in skeletal muscle Regulation of renin release 10 Activation of $\\\\\\\\beta_2$ receptors in the bronchial smooth muscle leads to which physiological effect? * Bronchoconstriction Bronchodilation Vasoconstriction of pulmonary vessels Decreased ciliary action Increased mucus secretion ← Previous Next → Submit Quiz ✓
