The nurse notes in the patient’s medication history that the patient is taking cyclobenzaprine (Flexeril). Based on this finding, the nurse interprets that the patient has which disorder?

Correct Answer: A

Rationale: The correct answer is A: A musculoskeletal injury. Cyclobenzaprine is a muscle relaxant commonly prescribed for musculoskeletal conditions such as muscle spasms and pain. This drug works by blocking nerve impulses that cause muscle contractions. Therefore, the nurse can infer that the patient is taking cyclobenzaprine for a musculoskeletal issue. Incorrect choices: B: Insomnia - Cyclobenzaprine is not indicated for insomnia. It has sedative effects, but it is primarily used for muscle relaxation. C: Epilepsy - Cyclobenzaprine is not used to treat epilepsy. It does not have anticonvulsant properties. D: Agitation - Cyclobenzaprine is not typically prescribed for agitation. It is specifically used for muscle-related issues.

Correct Answer: D

Rationale: The correct answer is D: Inhibiting cholesterol absorption in the small intestine. Ezetimibe works by blocking the NPC1L1 transporter in the small intestine, which reduces the absorption of cholesterol. This mechanism leads to decreased levels of LDL cholesterol in the blood. Choice A is incorrect as HMG-CoA reductase inhibitors like statins work by inhibiting cholesterol synthesis in the liver, not absorption in the intestine. Choice B is incorrect because ezetimibe does not affect bile acid resorption. Choice C is incorrect as ezetimibe does not activate lipase to break down cholesterol; rather, it inhibits cholesterol absorption.

Correct Answer: D

Rationale: The correct answer is D because determining the specific cause of anemia is crucial before starting treatment with folic acid. Folic acid is not used to treat all types of anemia (A), as different types require different treatments. Folic acid is specifically used to treat folate deficiency anemia, not iron-deficiency anemia (B) or pernicious anemia (C). Pernicious anemia is treated with vitamin B12, not folic acid. Therefore, the nurse must identify the underlying cause of anemia to ensure the appropriate treatment is provided.

Correct Answer: D

Rationale: The correct answer is D: All of the above. Drug molecules can bind to a variety of target proteins, including receptors, ion channels, and carriers. Receptors are often targeted to modulate cellular signaling pathways. Ion channels are targeted to regulate the flow of ions across cell membranes. Carriers are targeted to facilitate the transport of molecules across cell membranes. Therefore, the correct answer is D because drug molecules can bind to all three types of target proteins for therapeutic effects. Choices A, B, and C are incorrect because they each represent only one type of target protein that drug molecules can interact with, whereas the correct answer encompasses all possibilities.

Correct Answer: A

Rationale: Rationale: A: Incorrect. Local anesthetics are not metabolized at the site of administration but rather at systemic sites like plasma or liver. B: Correct. Local anesthetics are metabolized in the plasma or liver, not at the administration site. C: Incorrect. Ester anesthetics like procaine are metabolized by pseudocholinesterase in the plasma, not systemically. D: Incorrect. Amides like lidocaine are metabolized in the liver by microsomal mixed function oxidases, not at the administration site. Summary: Choice A is incorrect as local anesthetics are not metabolized at the site of administration but rather at systemic sites like plasma or liver. Choices B, C, and D provide accurate information about the metabolism of local anesthetics.