Which of the following channels does the local anesthetic molecules block once inside the nerve?
a. chloride
b. potassium
c. fluoride
d. sodium
Once inside the nerve, the ionized molecules block the sodium channels in the membrane thus decreasing the permeability (passage) of the nerve membrane to sodium ions, which prevents the generation of action potentials (a stimulus applied to a nerve allowing sodium to move into the neuron).
You might also like to view...
Self-medication is not suitable for nonhemorrhoidal anorectal disorders, which include all of the following EXCEPT:
A) Fissures. B) Abscesses. C) Itching. D) Polyps.
Heat-related injury may manifest itself as:
A) heat stroke. B) heat cramps. C) heat exhaustion. D) any of the above.
Which of the following responses are potential adverse effects of ?2 agonists? I. ventilation-perfusion mismatch II. tachycardia III. metabolic effects IV. muscle tremor
A. I, II only B. I, III, IV only C. II, III, IV only D. I, II, III, IV
Jaundice in neonatal patients is caused by increased levels of
A) bilirubin B) hemoglobin C) vitamin D D) calcium