ATI LPN
ATI Medical Surgical Endocrine Quiz Questions
Question 1 of 5
A 40-year-old woman has experienced increasingly frequent episodes of weakness accompanied by numbness and tingling in her hands and feet for the past year. On examination her blood pressure is 168/112 mm Hg. Laboratory studies show sodium, 142 mmol/L; potassium, 2.9 mmol/L; chloride, 104 mmol/L; HCO3-, 28 mmol/L; and glucose, 74 mg/dL. Her plasma renin activity is low. Which of the following radiologic findings is most likely to be present in this woman?
Correct Answer: A
Rationale: Hypokalemia with neuromuscular irritability, hypertension, and low plasma renin suggests hyperaldosteronism. The most common cause for primary hyperaldosteronism is idiopathic adrenal cortical nodular hyperplasia.
Question 2 of 5
All are characteristics of smooth muscle, except?
Correct Answer: B
Rationale: Smooth muscle uses calmodulin, not troponin, for contraction; others are true.
Question 3 of 5
Which of the following is a direct measurement of the oxygen-carrying capacity of blood?
Correct Answer: C
Rationale: Hemoglobin binds O2, directly measuring capacity; hematocrit is indirect.
Question 4 of 5
Which of the following equations shows the correct relation between blood flow (F), pressure (P), and resistance (R)?
Correct Answer: B
Rationale: F = P/R mirrors Ohm's law for fluids: flow is pressure divided by resistance.
Question 5 of 5
The nasal conchae epithelial surface serves to:
Correct Answer: D
Rationale: Nasal conchae perform all listed functions to condition air.