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Author Question: A 47-year-old man is suspected of having been exposed to nerve gas. Atropine is given to temporarily ... (Read 36 times)

cmoore54

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on: Jul 23, 2018
A 47-year-old man is suspected of having been exposed to nerve gas. Atropine is given to temporarily block cholinergic activity and to activate acetylcholine sites in the central nervous system.
 
  What drug does the nurse give with the atropine to free up the acetylcholinesteras e to start breaking down acetylcholine? A) Pyridostigmine
  B) Pralidoxime
  C) Neostigmine
  D) Rivastigmine

Question 2

A patient with benign prostatic hypertrophy (BPH) has been prescribed terazosin (Hytrin). How do alpha-adrenergic blockers, such as terazosin, assist in treating the symptoms of BPH?
 
  A) They increase gastric motility.
  B) They increase skeletal muscle contraction.
  C) They inhibit contraction of the urinary bladder.
  D) They decrease blood pressure.


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T4T

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Reply #1 on: Jul 23, 2018
Answer to Question 1

B
Feedback:
If nerve gas exposure is expected, patients who may have been exposed are given intramuscular injections of atropine (to temporarily block cholinergic activity and to activate acetylcholine sites in the central nervous system) and pralidoxime (to free up the acetylcholinesteras e to start breaking down acetylcholine). An auto-injection is provided to military personnel who may be at risk. The injector is used to give atropine and then pralidoxime. The injections are repeated in 15 minutes. If symptoms of nerve gas exposure exist after an additional 15 minutes, the injections are repeated. If symptoms still persist after a third set of injections, medical help should be sought. Pyridostigmine, neostigmine, and rivastigmine are not used in nerve gas exposure.

Answer to Question 2

C
Feedback:
Alpha1-adrenergic blockers block postsynaptic alpha1-adrenergic receptors, which results in a dilation of arterioles and veins and a relaxation of sympathetic effects on the bladder and urinary tract. This action makes these drugs useful in the treatment of BPH. BPH is characterized by obstructed urine flow as the enlarged prostate gland presses on the urethra. Alpha1-blocking agents can decrease urinary retention and improve urine flow by relaxing muscles in the prostate and urinary bladder. Options A, B, and D are not correct.


cmoore54

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Reply #2 on: Jul 23, 2018
Both answers were spot on, thank you once again


T4T

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Reply #3 on: Jul 23, 2018
Great! Please up vote :D


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