the tendency of a drug to combine with its receptor is called

NCLEX-PN

Nclex Questions Management of Care

1. What is the term for the tendency of a drug to combine with its receptor?

A. potency
B. efficacy
C. kinetics
D. affinity

Correct answer: D

Rationale: The correct answer is 'affinity.' Affinity refers to the close relationship or mutual attraction between a drug and its receptor, indicating the strength of the drug-receptor bonding. Potency (Choice A) is related to the dose of a drug needed to produce a specific effect. Efficacy (Choice B) refers to a drug's ability to generate the desired effect. Kinetics (Choice C) deals with forces affecting the motion of material bodies or changes in a system, which is not directly associated with the bonding between a drug and its receptor.

2. A nurse manager asks a nurse to work overtime because of a short-staffing problem. The nurse has made plans to do Christmas shopping after work and does not want to work overtime. What is the most assertive response by the nurse to her nurse manager?

A. "I'm not working overtime today."
B. "I have plans after work and will not be able to work overtime."
C. "You know how I hate to work overtime."
D. "I will if you need me, but I am not happy about this."

Correct answer: B

Rationale: The most assertive response in dealing with this conflict is the one that is direct and conveys a clear message in a positive manner. The nurse should assertively communicate her unavailability for overtime without being confrontational. Option A, "I'm not working overtime today," is too blunt and may come across as rude. Option C, "You know how I hate to work overtime," is not assertive but rather passive-aggressive. Option D, "I will if you need me, but I am not happy about this," is a passive-aggressive response as it implies compliance while expressing discontent. Option B, "I have plans after work and will not be able to work overtime," is the most appropriate response as it clearly states the nurse's unavailability without unnecessary aggression.

3. A nurse enters a client's room to administer a medication that has been prescribed by the health care provider. The client asks the nurse about the medication. Which response by the nurse is appropriate?

A. 'I know that it's for fluid buildup, and I think you've taken it before.''
B. 'It's called furosemide (Lasix), and it will promote urination and rid your body of the excess fluid. It can cause an alteration in electrolyte levels, so we'll need to increase the potassium in your diet.''
C. 'It's to help get rid of the swelling in your feet.''
D. ''You need to discuss this medication with your health care provider.''

Correct answer: B

Rationale: A client has the right to be informed of the medication name, purpose, action, and potential undesirable effects of a prescribed medication. The nurse should provide adequate information to the client. Choice B is the correct answer as it includes the medication name, its purpose (promoting urination and eliminating excess fluid), and a potential side effect (alteration in electrolyte levels) with a plan for managing it (increasing potassium in the diet). This response demonstrates thorough and complete information. Choice A provides some information but lacks details on potential side effects and dietary adjustments. Choice C is vague and does not provide specific details about the medication. Choice D deflects the client's question and does not fulfill the client's right to information.

4. The LPN is checking for residual before administering enteral feeding through a PEG tube. Which of these steps is incorrect?

A. The LPN elevates the head of the bed by at least 30 degrees.
B. If the residual is greater than 200mL, the LPN should not administer the enteral feeding.
C. The LPN should discard the residual before administering the tube feeding.
D. The residual pH level is tested to ensure appropriate placement.

Correct answer: C

Rationale: The incorrect step is choice C. The residual should be discarded before administering the tube feeding. Discarding the residual is essential to prevent contamination and ensure accurate measurement of the enteral feeding. Elevating the head of the bed by at least 30 degrees (choice A) is correct as it helps prevent aspiration during feeding. Testing the pH level of the residual (choice D) ensures proper placement of the tube. Withholding feeding if the residual is greater than 200mL (choice B) is crucial to prevent overfeeding, making this statement correct.

5. What are the hazards of improper splinting?

A. Aggravation of a bone or joint injury
B. Reduced distal circulation
C. Delay in transporting a client with a life-threatening injury
D. All of the above

Correct answer: D

Rationale: Hazards of improper splinting can lead to the aggravation of a bone or joint injury, reduced distal circulation, and delay in transporting a client with a life-threatening injury. Choosing 'All of the above' (Option D) is the correct answer as it encompasses all the hazards mentioned. Option A is incorrect because it only addresses one aspect of the hazards. Option B is incorrect as it does not cover all the hazards associated with improper splinting. Option C is incorrect as it focuses on only one hazard and does not account for the others.