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 ["A","B"]
Explanation
A) Hold metformin 24 hours to 48 hours before the CT. This is correct because it reduces the chance of metformin accumulating in the blood and causing lactic acidosis when combined with the contrast dye.
B) Hold metformin 48 hours after the CT. This is also correct because it allows time for the contrast dye to be eliminated from the body before resuming metformin.
C) Double the metformin dose after the CT. This is incorrect and dangerous because it can cause hypoglycemia, low blood sugar, which can lead to confusion, seizures, coma, or death. D) Take metformin as scheduled the day of the CT. This is incorrect and risky because it can result in high levels of metformin in the blood when mixed with the contrast dye, increasing the likelihood of lactic acidosis.
E) Resume metformin at half dose after the CT. This is incorrect and unnecessary because there is no evidence that reducing the dose of metformin after a CT scan with contrast dye has any benefit or reduces any harm.
Correct Answer is ["B","C","E"]
Explanation
a) Advising the client to avoid prolonged immobility and participate in exercise activities is a general health recommendation but not specifically related to warfarin therapy.
b) Safe and effective warfarin therapy requires rigid adherence to the dosing schedule to maintain therapeutic anticoagulation levels.
c) Monitoring PT/INR frequently initially and then regularly helps assess the effectiveness and safety of warfarin therapy.
d) Encouraging the use of NSAIDs is not recommended with warfarin due to the increased risk of bleeding.
e) Instructing the client to avoid foods high in Vitamin K is important because Vitamin K can interfere with the anticoagulant effects of warfarin.
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