ATI Complex Endocrine Mastery Assessment – 55
Questions with Detailed Answer Key Actual Exam
2026/2027 – Complete Q&A with Rationales – Pass
Guaranteed – A+ Graded
Section 1: Pituitary & Adrenal Gland Disorders
Q1: A nurse is reviewing the pathophysiology of diabetes insipidus with a group of
students. Which manifestation should the nurse expect to find in a patient with this
disorder?
A. Concentrated urine with low daily output and peripheral edema
B. Hyponatremia, weight gain, and bounding pulses
C. Dilute urine with excessive output and complaints of extreme thirst [CORRECT]
D. Fluid overload, headache, and concentrated urine with high specific gravity
Correct Answer: C
Rationale: Diabetes insipidus happens when ADH is missing or the kidneys don't
respond to it, so water isn't reabsorbed back into the blood. That produces large
amounts of very dilute urine, and the patient gets intensely thirsty as the body tries to
compensate for the fluid loss.
Q2: When caring for a patient with syndrome of inappropriate antidiuretic hormone
(SIADH), which laboratory finding best supports this diagnosis?
A. Elevated serum sodium and dilute urine with low specific gravity
B. Decreased serum sodium and concentrated urine with high specific gravity
[CORRECT]
C. Normal serum osmolality and high urine output exceeding 3 liters per day
D. Hyperkalemia, metabolic acidosis, and glucose intolerance
Correct Answer: B
Rationale: SIADH is all about too much ADH, so the body holds onto free water and
excretes small amounts of concentrated urine. That dilutes the blood sodium down,
,giving you hyponatremia, while the urine specific gravity stays high because the kidneys
are holding onto solutes.
Q3: A patient with SIADH has a serum sodium of 118 mEq/L and is increasingly
lethargic. Which nursing intervention should the nurse prioritize at this time?
A. Encourage oral fluid intake to prevent dehydration and maintain perfusion
B. Initiate seizure precautions and enforce strict fluid restriction [CORRECT]
C. Administer IV normal saline at 125 mL/hr to correct the sodium
D. Prepare the patient for a water-loading test to confirm the diagnosis
Correct Answer: B
Rationale: With sodium that low, the brain is at real risk for seizures from cerebral
edema. The first things you do are keep the patient safe with seizure precautions and
restrict fluids so you don't drop that sodium any further and make things worse.
Q4: A patient admitted after a severe head injury develops polyuria, intense polydipsia,
and a urine specific gravity of 1.002. The nurse anticipates which medication will most
likely be prescribed?
A. Furosemide to reduce fluid overload
B. Desmopressin acetate [CORRECT]
C. A vasopressin antagonist such as tolvaptan
D. Hydrochlorothiazide to concentrate the urine
Correct Answer: B
Rationale: Those findings scream diabetes insipidus from head trauma damaging the
posterior pituitary, and desmopressin is the synthetic ADH replacement that helps the
kidneys pull water back into circulation so the patient doesn't dehydrate.
Q5: A nurse is caring for a patient with Cushing's syndrome. Which assessment finding
is most consistent with this disorder?
A. Hyperpigmentation of the skin, hypotension, and salt cravings
B. Moon face, buffalo hump, and thin skin with easy bruising [CORRECT]
C. Weight loss, hyponatremia, and hyperkalemia with cardiac arrhythmias
D. Cold intolerance, periorbital edema, and delayed deep tendon reflexes
Correct Answer: B
, Rationale: Cushing's is cortisol excess, and it shows up in classic ways: fat
redistribution to the face and upper back, plus skin that thins out and bruises easily
because cortisol breaks down collagen and weakens blood vessels.
Q6: A patient with Addison's disease is admitted with fatigue, orthostatic hypotension,
and hyperpigmentation of the skin. Which laboratory result should the nurse expect to
review?
A. Hypernatremia and hypokalemia with metabolic alkalosis
B. Hyponatremia and hyperkalemia with metabolic acidosis [CORRECT]
C. Hyperglycemia, hypokalemia, and elevated cortisol levels
D. Hypocalcemia and an elevated thyroid-stimulating hormone level
Correct Answer: B
Rationale: Addison's is adrenal insufficiency, so aldosterone drops and the kidneys can't
hold onto sodium or get rid of potassium. You end up with low sodium, high potassium,
and that characteristic darkening of the skin from high ACTH trying to stimulate the
failing adrenals.
Q7: A patient on long-term prednisone therapy presents with hypotension,
hyponatremia, and hyperkalemia. The nurse recognizes these findings as indicative of
which complication?
A. Exacerbation of Cushing's syndrome from steroid toxicity
B. Iatrogenic adrenal insufficiency [CORRECT]
C. Primary hyperaldosteronism with renal artery stenosis
D. Syndrome of inappropriate antidiuretic hormone from pituitary suppression
Correct Answer: B
Rationale: When someone's been on prednisone for a long time, their own adrenal
glands basically go to sleep and stop making cortisol. If the steroid is stopped too
quickly or the body faces stress, that suppressed adrenal function leads to an
insufficiency crisis with the exact triad you see here: low blood pressure, low sodium,
and high potassium.
Q8: The nurse is educating a patient with diabetes insipidus about home management.
Which statement by the patient indicates understanding of the condition?
A. "I should weigh myself daily and report any sudden weight loss to my doctor."
B. "I need to drink fluids only when I feel thirsty and avoid overhydration."
Questions with Detailed Answer Key Actual Exam
2026/2027 – Complete Q&A with Rationales – Pass
Guaranteed – A+ Graded
Section 1: Pituitary & Adrenal Gland Disorders
Q1: A nurse is reviewing the pathophysiology of diabetes insipidus with a group of
students. Which manifestation should the nurse expect to find in a patient with this
disorder?
A. Concentrated urine with low daily output and peripheral edema
B. Hyponatremia, weight gain, and bounding pulses
C. Dilute urine with excessive output and complaints of extreme thirst [CORRECT]
D. Fluid overload, headache, and concentrated urine with high specific gravity
Correct Answer: C
Rationale: Diabetes insipidus happens when ADH is missing or the kidneys don't
respond to it, so water isn't reabsorbed back into the blood. That produces large
amounts of very dilute urine, and the patient gets intensely thirsty as the body tries to
compensate for the fluid loss.
Q2: When caring for a patient with syndrome of inappropriate antidiuretic hormone
(SIADH), which laboratory finding best supports this diagnosis?
A. Elevated serum sodium and dilute urine with low specific gravity
B. Decreased serum sodium and concentrated urine with high specific gravity
[CORRECT]
C. Normal serum osmolality and high urine output exceeding 3 liters per day
D. Hyperkalemia, metabolic acidosis, and glucose intolerance
Correct Answer: B
Rationale: SIADH is all about too much ADH, so the body holds onto free water and
excretes small amounts of concentrated urine. That dilutes the blood sodium down,
,giving you hyponatremia, while the urine specific gravity stays high because the kidneys
are holding onto solutes.
Q3: A patient with SIADH has a serum sodium of 118 mEq/L and is increasingly
lethargic. Which nursing intervention should the nurse prioritize at this time?
A. Encourage oral fluid intake to prevent dehydration and maintain perfusion
B. Initiate seizure precautions and enforce strict fluid restriction [CORRECT]
C. Administer IV normal saline at 125 mL/hr to correct the sodium
D. Prepare the patient for a water-loading test to confirm the diagnosis
Correct Answer: B
Rationale: With sodium that low, the brain is at real risk for seizures from cerebral
edema. The first things you do are keep the patient safe with seizure precautions and
restrict fluids so you don't drop that sodium any further and make things worse.
Q4: A patient admitted after a severe head injury develops polyuria, intense polydipsia,
and a urine specific gravity of 1.002. The nurse anticipates which medication will most
likely be prescribed?
A. Furosemide to reduce fluid overload
B. Desmopressin acetate [CORRECT]
C. A vasopressin antagonist such as tolvaptan
D. Hydrochlorothiazide to concentrate the urine
Correct Answer: B
Rationale: Those findings scream diabetes insipidus from head trauma damaging the
posterior pituitary, and desmopressin is the synthetic ADH replacement that helps the
kidneys pull water back into circulation so the patient doesn't dehydrate.
Q5: A nurse is caring for a patient with Cushing's syndrome. Which assessment finding
is most consistent with this disorder?
A. Hyperpigmentation of the skin, hypotension, and salt cravings
B. Moon face, buffalo hump, and thin skin with easy bruising [CORRECT]
C. Weight loss, hyponatremia, and hyperkalemia with cardiac arrhythmias
D. Cold intolerance, periorbital edema, and delayed deep tendon reflexes
Correct Answer: B
, Rationale: Cushing's is cortisol excess, and it shows up in classic ways: fat
redistribution to the face and upper back, plus skin that thins out and bruises easily
because cortisol breaks down collagen and weakens blood vessels.
Q6: A patient with Addison's disease is admitted with fatigue, orthostatic hypotension,
and hyperpigmentation of the skin. Which laboratory result should the nurse expect to
review?
A. Hypernatremia and hypokalemia with metabolic alkalosis
B. Hyponatremia and hyperkalemia with metabolic acidosis [CORRECT]
C. Hyperglycemia, hypokalemia, and elevated cortisol levels
D. Hypocalcemia and an elevated thyroid-stimulating hormone level
Correct Answer: B
Rationale: Addison's is adrenal insufficiency, so aldosterone drops and the kidneys can't
hold onto sodium or get rid of potassium. You end up with low sodium, high potassium,
and that characteristic darkening of the skin from high ACTH trying to stimulate the
failing adrenals.
Q7: A patient on long-term prednisone therapy presents with hypotension,
hyponatremia, and hyperkalemia. The nurse recognizes these findings as indicative of
which complication?
A. Exacerbation of Cushing's syndrome from steroid toxicity
B. Iatrogenic adrenal insufficiency [CORRECT]
C. Primary hyperaldosteronism with renal artery stenosis
D. Syndrome of inappropriate antidiuretic hormone from pituitary suppression
Correct Answer: B
Rationale: When someone's been on prednisone for a long time, their own adrenal
glands basically go to sleep and stop making cortisol. If the steroid is stopped too
quickly or the body faces stress, that suppressed adrenal function leads to an
insufficiency crisis with the exact triad you see here: low blood pressure, low sodium,
and high potassium.
Q8: The nurse is educating a patient with diabetes insipidus about home management.
Which statement by the patient indicates understanding of the condition?
A. "I should weigh myself daily and report any sudden weight loss to my doctor."
B. "I need to drink fluids only when I feel thirsty and avoid overhydration."
