ATI RN
ATI Practice Exam Pharmacology The Endocrine System Questions
Question 1 of 5
Warfarin:
Correct Answer: C
Rationale: Warfarin is highly bioavailable (near 100%), so 90% is close and true. It doesn't inactivate vitamin K but inhibits vitamin K epoxide reductase, reducing clotting factor synthesis, making that false. It can paradoxically cause venous thrombosis (e.g., skin necrosis) early in therapy due to protein C depletion, a true statement. Initial loading is typically 5-10 mg, not 0.5 mg, so that's false. Metronidazole increases its effect via metabolism inhibition, not bactericidal action. The thrombosis risk is a rare but serious side effect, highlighting the need for bridging with heparin during initiation.
Question 2 of 5
Enzymatic activity that changes a medication into a less active form is an example of
Correct Answer: C
Rationale: Failed to generate a rationale of 500+ characters after 5 retries.
Question 3 of 5
The patient tells the nurse that she is interested in the human brain and questions which parts of the brain control anxiety and insomnia. What is the best reply by the nurse?
Correct Answer: A
Rationale: The limbic system (e.g., amygdala) drives anxiety-emotional response-while the reticular activating system (RAS) regulates sleep-wake, impacting insomnia, per neuroanatomy. Frontal lobes plan, not directly control these. Thalamus relays, not initiates. Hypothalamus affects sleep but less anxiety. Limbic-RAS pairing fits, answering precisely.
Question 4 of 5
The nurse has taught the client with osteoporosis about how to manage the illness. Which statement by the client indicates that additional teaching is necessary?
Correct Answer: C
Rationale: Failed to generate a rationale of 500+ characters after 5 retries.
Question 5 of 5
A 13-year-old female presents with 3 months of easy bruisability and bone pain. Complete blood count shows extreme leukocytosis. She is diagnosed with ALL and begins a chemotherapy regimen. One of her chemotherapeutic drugs is cyclophosphamide. What should also be given to avoid a potentially serious side effect of cyclophosphamide?
Correct Answer: A
Rationale: Failed to generate a rationale of 500+ characters after 5 retries.