RN exams pharmacology practice questions set 21

Correct answer:

The correct answer is B: The patient’s readiness to learn. This is the most essential component because it determines the patient’s receptiveness and ability to understand and apply the medication teaching plan. Assessing the patient’s readiness ensures that the teaching is tailored to their individual needs and learning style, increasing the likelihood of successful medication management. A: Written instructions may be helpful but are not as effective if the patient is not ready to learn. C: Use of colorful charts can enhance understanding, but without considering the patient’s readiness, it may not be as impactful. D: Review of community resources is important but not as crucial as assessing the patient’s readiness to learn for effective medication teaching.

Correct answer:

The correct answer is B because in heart failure, furosemide helps with fluid removal through diuresis, leading to decreased fluid overload. A decrease in respiratory rate from 28/min to 20/min and increased depth suggests improved lung function due to reduced fluid accumulation in the lungs. This indicates a favorable response to furosemide therapy. Choice A is incorrect because a decrease in level of consciousness and increased sleepiness is not a favorable response to furosemide. Choice C is incorrect because increased congestion in breath sounds and complaints of shortness of breath indicate worsening symptoms, not an improvement. Choice D is incorrect because a urine output of 50 mL/4 hours is low and indicates inadequate response to diuretic therapy.

Correct answer:

The correct answer is D because when administering heparin subcutaneously, using a - to -inch 25- to 28-gauge needle is appropriate to ensure proper delivery into the subcutaneous tissue. This needle size is suitable for subcutaneous injections and helps prevent complications such as leakage or irritation. As for the other choices: A: Aspirating the syringe before injecting the medication is not necessary for subcutaneous injections as it is commonly done for intramuscular injections to ensure proper needle placement. B: Massaging the site after injection is not recommended as it can cause bruising or discomfort. C: Applying heat to the injection site is not a standard procedure for subcutaneous injections and may not provide any benefit in this context.

Correct answer:

The correct answer is A: 350-400 mg. The recommended daily allowance of magnesium for adults is typically around 350-400 mg. This amount is based on the average dietary intake needed to maintain optimal health and bodily functions. Magnesium plays a crucial role in various physiological processes such as muscle and nerve function, blood sugar regulation, and bone health. Choice B (6-9 g) is too high for daily magnesium intake and could lead to toxicity symptoms. Choice C (25 g) is also excessively high and can cause serious health issues. Choice D (1.5-4 mg) is too low and would not meet the body's daily magnesium requirements. Therefore, the correct answer is A as it falls within the recommended range for daily magnesium intake to support overall well-being.

Correct answer:

Step 1: Reading labels carefully on vials containing flush solutions for locks is crucial to ensure the correct solution is being used. Step 2: Potassium chloride should not be used to flush locks as it can be fatal if administered incorrectly. Step 3: By carefully reading labels, the nurse can verify that the correct solution is being used, thus minimizing the risk of using potassium chloride. Summary: - Choice A is incorrect as using a dilute form of potassium chloride does not address the issue of incorrect administration. - Choice B is incorrect as warming the solution does not prevent the risk associated with using potassium chloride. - Choice D is incorrect as replacing locks does not address the root cause of the issue, which is improper administration.

Correct answer:

The correct answer is D: Down-regulate the numbers of that specific receptor. Step 1: When an agonist continuously activates a receptor, the body may reduce the number of receptors to maintain homeostasis. Step 2: Down-regulation is a feedback mechanism to decrease receptor sensitivity due to excessive stimulation. Step 3: This helps prevent overstimulation and desensitization of the receptor. Summary: A: Up-regulating the total number of receptors is unlikely as the body typically down-regulates in response to prolonged agonist exposure. B: Blocking the receptor with a partial agonist is not a typical response to repeated agonist exposure. C: Altering the drug's metabolism is not directly related to receptor down-regulation in response to agonist stimulation.

Correct answer:

The correct answer is A: Hypoglycemia. Metformin is a medication commonly used to treat diabetes by lowering blood sugar levels. When reviewing medical records, if a patient is scheduled for surgery and taking metformin, it's crucial to assess for the risk of hypoglycemia. Surgery can impact food intake and medication absorption, potentially leading to low blood sugar levels. This is important to prevent complications during surgery. Choice B: Hemorrhage is incorrect because metformin is not known to directly increase the risk of hemorrhage related to surgery. The main concern with metformin is hypoglycemia, not hemorrhage. Choices C and D were not provided, but the key point is to focus on the risk of hypoglycemia with metformin in a surgical setting.

Correct answer:

A chemical antagonist (D) best describes an antagonist that interacts directly with the agonist, not the receptor, by neutralizing or binding it (e.g., protamine with heparin). Pharmacological antagonists (A) block receptors directly (e.g., propranolol). Partial agonists (B) bind receptors but produce submaximal effects (e.g., buprenorphine). Physiological antagonists (C) oppose effects via different receptors (e.g., epinephrine vs. histamine). Noncompetitive antagonists (original E) bind irreversibly to receptors, reducing efficacy. Chemical antagonism, a rare but specific mechanism, alters the agonist's availability without receptor interaction, critical in overdose reversal or chelation therapies, distinct from receptor-based antagonism in pharmacodynamics.

Correct answer:

A chemical antagonist (D) best describes an antagonist that interacts directly with the agonist, not the receptor, by neutralizing or binding it (e.g., protamine with heparin). Pharmacological antagonists (A) block receptors directly (e.g., propranolol). Partial agonists (B) bind receptors but produce submaximal effects (e.g., buprenorphine). Physiological antagonists (C) oppose effects via different receptors (e.g., epinephrine vs. histamine). Noncompetitive antagonists (original E) bind irreversibly to receptors, reducing efficacy. Chemical antagonism, a rare but specific mechanism, alters the agonist's availability without receptor interaction, critical in overdose reversal or chelation therapies, distinct from receptor-based antagonism in pharmacodynamics.

Correct answer:

Angiotensin 2 receptor antagonists work by blocking the action of angiotensin 2 on its receptors, therefore inhibiting the renin-angiotensin-aldosterone system (RAAS). By inhibiting this system, angiotensin 2 receptor antagonists help to decrease blood pressure and reduce the workload on the heart. This is in contrast to ACE inhibitors, which also affect the RAAS but work by preventing the formation of angiotensin 2 in the first place. Beta blockers, such as propranolol, work by blocking the effects of adrenaline (epinephrine) on beta receptors, mainly in the heart. While they are commonly used to manage high blood pressure and reduce the heart rate, they do not directly decrease the renin-angiotensin-aldosterone system like angiotensin 2 receptor antagonists.