Question

The drug vecuronium directly inhibits which ion flux pictured here?

1) 5
2) 2
3) 6
4) 7
5) 1

Answer 1

Vecuronium inhibits the Na+ ion flux necessary for muscle contraction by blocking acetylcholine receptors at the neuromuscular junction, corresponding to ion flux number 3.

Step-by-step explanation:

The drug vecuronium is a neuromuscular blocking agent which acts at the neuromuscular junction to inhibit acetylcholine from binding to its receptors on the muscle cell surface. This inhibition prevents the influx of sodium ions (Na+), which is necessary for muscle contraction. Therefore, the ion flux that vecuronium inhibits corresponds to the entry of Na+ ions. Given the options listed in the question, the correct answer would be that vecuronium inhibits ion flux number 3, pertaining to the transfer of Na+ ions across the membrane as mentioned in the reference information.