Naloxone is effective because of which action?
Increasing the excretion of morphine sulfate by altering serum pH.
Preventing activation of opioid receptors through antagonist actions.
Regulating the sensitivity of opioid receptors by neurochemical alterations.
Countering the effects of morphine sulfate by agonist actions.
The Correct Answer is B
a) Naloxone does not increase the excretion of opioids by altering serum pH; its primary action is at the receptor level.
b) Naloxone is an opioid receptor antagonist, meaning it blocks or prevents the activation of opioid receptors. This is how it counteracts the effects of opioids like morphine.
c) Naloxone does not regulate the sensitivity of opioid receptors by neurochemical alterations. Its action is more direct as an antagonist.
d) Naloxone is not an agonist; it does not produce opioid-like effects. Instead, it competes with opioids for receptor binding and blocks their effects.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
a) Antihistamines are generally considered safe during breastfeeding, but this statement does not address the safety during pregnancy.
b) The general recommendation is to avoid unnecessary medication use during pregnancy, including antihistamines, especially during the first trimester.
c) The margin of safety for antihistamines is not universally understood, and caution is advised during pregnancy.
d) While second-generation antihistamines are considered safer than first-generation ones, the safety of any medication during pregnancy should be discussed with a healthcare provider.
Correct Answer is C
Explanation
A) Elevated temperature is not a typical reason to withhold morphine unless there are other concerns, such as infection.
B) Elevated blood pressure alone is not a reason to withhold morphine, but it should be considered in the context of the overall clinical picture.
C) A respiratory rate of 10 breaths per minute with low oxygen saturation indicates respiratory depression, which is a significant concern and a reason to withhold morphine.
D) An elevated heart rate alone is not a reason to withhold morphine, but it should be considered in the context of the overall clinical picture.
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