Autonomic nervous system

      Q1. All the following are the actions of acetylcholine except

1. Increase in heart rate
2. Dilatation of pupil
3. Contraction of detrusor muscle
4. Increased salivation         

Q2. Which of the following is not a cholinergic drug

1. Scopolamine
2. Muscarine
3. Pilocarpine
4. Bethenacol  

Q3. The atropine derivative used in the treatment of bronchial asthma is

1. Homatropine
2. Oxybutynin
3. Pirenzepine
4. Ipratropium  

       Q4. Which of the following statements is not true regarding neostigmine

1. It is a reversible anticholinesterase
2. It crosses the blood brain barrier
3. It is used to treat myasthenia gravis
4. It should not be used in organophosphorus poisoning
    Q1. Answer - 2. Dilatation of pupils. Acetylcholine causes pupillary constraiction by acting on M3 receptors. 

Q2. Answer - 1. Scopolamine. It is an anticholinergic like atropine.

Q3. Answer - 4. Ipratropium. Why is it preferred over atropine for bronchial asthma?

Q4. Answer - 2. It crosses the blood brain barrier. Since it does not it is preferred for myasthenia gravis.