Florida Endocrinologist Licensing Exam Test
Questions And Correct Answers (Verified
Answers) Plus Rationales 2025/2026 Q&A
| Instant Download Pdf
1. Which hormone is primarily responsible for lowering blood glucose levels?
Insulin
Rationale: Insulin, secreted by pancreatic beta cells, facilitates glucose
uptake into cells and decreases blood glucose levels.
2. The most common cause of primary hypothyroidism in the United States is:
Hashimoto’s thyroiditis
Rationale: Hashimoto’s is an autoimmune disease leading to progressive
destruction of the thyroid gland.
3. A patient presents with exophthalmos, heat intolerance, and weight loss.
The most likely diagnosis is:
Graves’ disease
Rationale: Graves’ disease is an autoimmune hyperthyroidism
characterized by these classic symptoms.
4. Which hormone stimulates calcium release from bones?
Parathyroid hormone (PTH)
, Rationale: PTH increases blood calcium by promoting bone resorption,
increasing renal reabsorption of calcium, and activating vitamin D.
5. Which lab finding is most characteristic of primary hyperaldosteronism?
Elevated aldosterone with suppressed renin
Rationale: Primary hyperaldosteronism involves autonomous aldosterone
secretion, suppressing renin through feedback.
6. The first-line therapy for type 2 diabetes is:
Metformin
Rationale: Metformin decreases hepatic glucose production and improves
insulin sensitivity.
7. Cushing’s syndrome results from chronic exposure to:
Excess cortisol
Rationale: Cortisol excess, from endogenous (ACTH-producing tumors) or
exogenous sources (glucocorticoids), causes Cushingoid features.
8. Which pituitary hormone stimulates cortisol production by the adrenal
cortex?
Adrenocorticotropic hormone (ACTH)
Rationale: ACTH from the anterior pituitary acts on the adrenal cortex to
increase cortisol secretion.
9. A patient with polyuria, polydipsia, and hypernatremia likely has:
Diabetes insipidus
Rationale: Diabetes insipidus is characterized by ADH deficiency or
resistance, causing free water loss and hypernatremia.
, 10.The most common cause of secondary osteoporosis in men is:
Hypogonadism
Rationale: Low testosterone leads to decreased bone density and
increased fracture risk in men.
11.Which lab test is most sensitive for detecting primary hyperthyroidism?
TSH (suppressed)
Rationale: TSH suppression is the earliest and most sensitive indicator of
primary hyperthyroidism.
12.In type 1 diabetes, the underlying pathophysiology is:
Autoimmune destruction of pancreatic beta cells
Rationale: Type 1 diabetes is an autoimmune disease leading to insulin
deficiency.
13.Which of the following is a common cause of secondary hypothyroidism?
Pituitary adenoma
Rationale: Pituitary adenomas can reduce TSH secretion, leading to
secondary hypothyroidism.
14.The best screening test for pheochromocytoma is:
Plasma free metanephrines
Rationale: Plasma free metanephrines have high sensitivity and specificity
for catecholamine-secreting tumors.
15.Which vitamin is essential for calcium absorption in the gut?
Vitamin D
Rationale: Vitamin D promotes intestinal absorption of calcium, necessary
for bone mineralization.
Questions And Correct Answers (Verified
Answers) Plus Rationales 2025/2026 Q&A
| Instant Download Pdf
1. Which hormone is primarily responsible for lowering blood glucose levels?
Insulin
Rationale: Insulin, secreted by pancreatic beta cells, facilitates glucose
uptake into cells and decreases blood glucose levels.
2. The most common cause of primary hypothyroidism in the United States is:
Hashimoto’s thyroiditis
Rationale: Hashimoto’s is an autoimmune disease leading to progressive
destruction of the thyroid gland.
3. A patient presents with exophthalmos, heat intolerance, and weight loss.
The most likely diagnosis is:
Graves’ disease
Rationale: Graves’ disease is an autoimmune hyperthyroidism
characterized by these classic symptoms.
4. Which hormone stimulates calcium release from bones?
Parathyroid hormone (PTH)
, Rationale: PTH increases blood calcium by promoting bone resorption,
increasing renal reabsorption of calcium, and activating vitamin D.
5. Which lab finding is most characteristic of primary hyperaldosteronism?
Elevated aldosterone with suppressed renin
Rationale: Primary hyperaldosteronism involves autonomous aldosterone
secretion, suppressing renin through feedback.
6. The first-line therapy for type 2 diabetes is:
Metformin
Rationale: Metformin decreases hepatic glucose production and improves
insulin sensitivity.
7. Cushing’s syndrome results from chronic exposure to:
Excess cortisol
Rationale: Cortisol excess, from endogenous (ACTH-producing tumors) or
exogenous sources (glucocorticoids), causes Cushingoid features.
8. Which pituitary hormone stimulates cortisol production by the adrenal
cortex?
Adrenocorticotropic hormone (ACTH)
Rationale: ACTH from the anterior pituitary acts on the adrenal cortex to
increase cortisol secretion.
9. A patient with polyuria, polydipsia, and hypernatremia likely has:
Diabetes insipidus
Rationale: Diabetes insipidus is characterized by ADH deficiency or
resistance, causing free water loss and hypernatremia.
, 10.The most common cause of secondary osteoporosis in men is:
Hypogonadism
Rationale: Low testosterone leads to decreased bone density and
increased fracture risk in men.
11.Which lab test is most sensitive for detecting primary hyperthyroidism?
TSH (suppressed)
Rationale: TSH suppression is the earliest and most sensitive indicator of
primary hyperthyroidism.
12.In type 1 diabetes, the underlying pathophysiology is:
Autoimmune destruction of pancreatic beta cells
Rationale: Type 1 diabetes is an autoimmune disease leading to insulin
deficiency.
13.Which of the following is a common cause of secondary hypothyroidism?
Pituitary adenoma
Rationale: Pituitary adenomas can reduce TSH secretion, leading to
secondary hypothyroidism.
14.The best screening test for pheochromocytoma is:
Plasma free metanephrines
Rationale: Plasma free metanephrines have high sensitivity and specificity
for catecholamine-secreting tumors.
15.Which vitamin is essential for calcium absorption in the gut?
Vitamin D
Rationale: Vitamin D promotes intestinal absorption of calcium, necessary
for bone mineralization.
