Nokea
Which of the following is NOT true regarding ligand-gated ion channels?
- A. React quickly to a stimulus or ligand
- B. Can have intracellular binding sites
- C. Can exhibit allosteric binding
- D. Open or close in response to deformations in the cell membrane
Correct Answer: D
Rationale: Ligand-gated channels respond to ligands, not mechanical deformation (which is typical of mechanosensitive channels).
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Digoxin may cause a type A adverse drug reaction due to:
- A. Idiosyncratic effects
- B. Its narrow therapeutic index
- C. Being a teratogen
- D. Being a carcinogen
Correct Answer: B
Rationale: Digoxin's narrow therapeutic index leads to Type A (dose-related) ADRs like toxicity, not idiosyncratic or teratogenic/carcinogenic effects .
A group of nursing students are reviewing information about the process of drug development in the United States. The students demonstrate understanding of this process when they identify that which of the following categories are assigned by the Food and Drug Administration to newly approved drugs?Select one that does not apply
- A. Metabolite
- B. controlled substance
- C. Prescription
- D. Nonprescription
Correct Answer: A
Rationale: Once drugs are approved for use, the FDA assigns the drug to one of the following categories: prescription, nonprescription, or controlled substance. Metabolite refers to the inactive form of the drug. Noncontrolled substance is a term that is not used.
Patients who are on chronic long-term proton pump inhibitor therapy require monitoring for:
- A. Iron deficiency anemia, vitamin B12 and calcium deficiency
- B. Folate and magnesium deficiency
- C. Elevated uric acid levels leading to gout
- D. Hypokalemia and hypocalcemia
Correct Answer: A
Rationale: PPIs impair absorption of iron, B12, and calcium long-term; magnesium is also a risk but less emphasized here.
The patient asks the nurse why generic drugs would be used and voices concerns that only the brand name product will be safe. What is the nurse's best response?
- A. Generic drugs are often less expensive.
- B. Some quality control problems have been found with generic drugs.
- C. Most generic drugs are very safe and can be cost effective as well.
- D. Although initial cost is higher for a brand name it may cost less in the long run.
Correct Answer: C
Rationale: Most generic medications are completely safe and may be identical to the brand name drug except generic medications are often less expensive, but this does not address the patient's concern about safety. Although some quality control issues have occurred in the past, this does not address the patient's concerns regarding safety or explain why generic drugs are prescribed and used. Although some doctors believe initial cost is higher but will cost less over time, this response also does not address the patient's concerns.
Glucocorticoids:
- A. Decrease amount of immunocompetent cells and macrophages in the blood
- B. Stimulate activity of macrophages and monocytes
- C. Increase amount of T lymphocytes
- D. Stimulate production of antibodies
Correct Answer: A
Rationale: Glucocorticoids reduce immunocompetent cells and macrophages, contributing to their immunosuppressive effects.