ATI LPN
ATI Quiz Medical Surgical Endocrine Questions
Question 1 of 5
A 37-year-old woman states that, although most of the time she feels fine, she has had episodes of palpitations, tachycardia, tremor, diaphoresis, and headache over the past 3 months. When her symptoms are worse, her blood pressure is measured in the range of 155/90 mm Hg. She collapses suddenly one day and is brought to the hospital, where her ventricular fibrillation is converted successfully to sinus rhythm. On physical examination, there are no remarkable findings. Which of the following laboratory findings is most likely to be reported in this patient?
Correct Answer: D
Rationale: These findings suggest a pheochromocytoma of the adrenal medulla. This is a rare neoplasm, but in cases of episodic hypertension, this diagnosis should be considered. Screening for urinary free catecholamines, metanephrine, and vanillylmandelic acid (VMA) can help to determine the diagnosis.
Question 2 of 5
What is correct regarding cardiac contractile cells?
Correct Answer: D
Rationale: All are true: unique structure, plateau phase (Ca2+ influx), dual Ca2+ sources.
Question 3 of 5
Type O blood has antibodies to which of the following in the blood plasma?
Correct Answer: C
Rationale: Type O has anti-A and anti-B, as it lacks A/B antigens.
Question 4 of 5
The classic pathway of complement activation begins when the protein C1 binds to:
Correct Answer: C
Rationale: C1 binds antigen-antibody complexes, initiating classic complement.
Question 5 of 5
During hyperpnea:
Correct Answer: D
Rationale: Hyperpnea (deep breathing) requires active inspiration (diaphragm, external intercostals) and expiration (internal intercostals, abdominals).