Match the drug effect to the receptor it stimulates or blocks.

Here are the answers to the questions: Questions 12 to 16 12. A drug causing mydriasis (pupil dilation) will stimulate A) 1 adrenergic receptors. 13. A drug causing failure to ejaculate will block A) 1 adrenergic receptors. 14. A drug causing bronchodilatation in a patient with asthma will stimulate D) 2 adrenergic receptors. 15. A drug causing positive inotropic effect (increased heart contractility) in a patient with heart failure will stimulate C) 1 adrenergic receptors. 16. A drug causing hyperglycemia (increase plasma sugar levels) will stimulate B) 2 adrenergic receptors (by inhibiting insulin release) and D) 2 adrenergic receptors (by increasing glycogenolysis and gluconeogenesis). Given the options, 2 is a direct mechanism for hyperglycemia. Questions 17 to 20 17. A drug that improves muscle rigidity for a Parkinson's patient will stimulate B) D2 dopaminergic receptors. 18. A drug that will reduce SAN automaticity (heart rate) in an arrhythmic patient will stimulate C) M2 cholinergic receptors. 19. Ipratropium bromide is an atropine substitute that binds and blocks muscarinic receptors. Its therapeutic effect in bronchodilation is primarily due to blocking D) M3 cholinergic receptors, though it also blocks M2 receptors. 20. Acetylcholine will cause muscle stimulation for contraction by stimulating E) Nm cholinergic receptors. Questions 21 to 23 21. The cholinomimetic drug that is useful for treating postoperative-abdominal distention and gastric atony is C) Carbachol. 22. Pralidoxime chloride is a drug that C) Reactivates cholinesterases that have been inhibited by organophosphate cholinesterase inhibitors. 23. The cholinesterase inhibitor that is used in the diagnosis of myasthenia gravis is A) Edrophonium chloride. Section B: Short answer questions The listed drugs for this section are not visible in the provided image. What's next?