A4M 2026/2027 Exam (Questions and Answers with Rationales) –
A4M001 Endocrinology, Cardiology & Neurology Q&A
Sections:
1. Endocrinology
2. Cardiology
3. Neurology
SECTION I — ENDOCRINOLOGY
1. Which hormone is primarily responsible for lowering blood glucose?
A. Glucagon
B. Cortisol
C. Insulin
D. Epinephrine
Answer: C. Insulin
Rationale: Insulin promotes glucose uptake into skeletal muscle and adipose
tissue and suppresses hepatic glucose production, thereby lowering circulating
glucose.
2. Which pancreatic cells produce insulin?
A. Alpha cells
B. Beta cells
C. Delta cells
D. PP cells
Answer: B. Beta cells
Rationale: Pancreatic beta cells in the islets of Langerhans synthesize and secrete
insulin in response primarily to elevated blood glucose.
,3. Which pancreatic hormone raises blood glucose?
A. Insulin
B. Somatostatin
C. Glucagon
D. Amylin
Answer: C. Glucagon
Rationale: Glucagon stimulates hepatic glycogenolysis and gluconeogenesis,
increasing circulating glucose during fasting or hypoglycemia.
4. Which laboratory test best reflects average glycemic control over
approximately three months?
A. Fasting glucose
B. Random glucose
C. HbA1c
D. C-peptide
Answer: C. HbA1c
Rationale: Hemoglobin A1c reflects glycation of hemoglobin over the lifespan of
circulating erythrocytes and provides an estimate of longer-term glucose
exposure.
5. Which finding is most characteristic of diabetic ketoacidosis?
A. Severe hypercalcemia
B. Metabolic acidosis with ketones
C. Respiratory alkalosis without ketones
D. Hypernatremia without hyperglycemia
Answer: B. Metabolic acidosis with ketones
Rationale: DKA results from insulin deficiency with increased lipolysis and ketone
production, producing high-anion-gap metabolic acidosis.
,6. Which patient is at greatest risk for diabetic ketoacidosis?
A. Patient with untreated type 1 diabetes
B. Patient with mild hyperlipidemia
C. Patient with controlled hypothyroidism
D. Patient with isolated hypertension
Answer: A. Patient with untreated type 1 diabetes
Rationale: Absolute insulin deficiency in type 1 diabetes promotes uncontrolled
lipolysis and ketogenesis, making DKA particularly likely.
7. Which finding is more characteristic of hyperosmolar hyperglycemic state
than DKA?
A. Marked ketosis
B. Severe hyperosmolarity with minimal ketosis
C. Profound hypoglycemia
D. Low serum glucose
Answer: B. Severe hyperosmolarity with minimal ketosis
Rationale: HHS generally produces profound hyperglycemia and hyperosmolarity
with little or no significant ketoacidosis.
8. What is the initial priority in a patient with severe hyperglycemic
dehydration?
A. Oral calcium
B. Intravenous fluid replacement
C. Thyroid hormone
D. Potassium restriction
Answer: B. Intravenous fluid replacement
Rationale: Significant osmotic diuresis causes major volume depletion. Restoring
circulating volume is a fundamental initial intervention.
, 9. Which symptom strongly suggests hypoglycemia?
A. Diaphoresis and tremor
B. Polyuria only
C. Dry skin
D. Bradykinesia
Answer: A. Diaphoresis and tremor
Rationale: Adrenergic activation during hypoglycemia causes sweating, tremor,
palpitations, anxiety, and hunger before neuroglycopenic symptoms develop.
10. Which treatment is appropriate for a conscious patient with symptomatic
mild hypoglycemia?
A. Fast-acting carbohydrate
B. Long-acting insulin
C. Fluid restriction
D. Potassium supplementation
Answer: A. Fast-acting carbohydrate
Rationale: A conscious patient able to swallow should receive rapidly absorbed
carbohydrate to raise blood glucose promptly.
11. Which thyroid hormone is biologically most active at the tissue level?
A. T4
B. T3
C. Reverse T3
D. Thyroglobulin
Answer: B. T3
Rationale: Triiodothyronine has greater biological activity than thyroxine. Much
circulating T3 is generated through peripheral conversion of T4.
A4M001 Endocrinology, Cardiology & Neurology Q&A
Sections:
1. Endocrinology
2. Cardiology
3. Neurology
SECTION I — ENDOCRINOLOGY
1. Which hormone is primarily responsible for lowering blood glucose?
A. Glucagon
B. Cortisol
C. Insulin
D. Epinephrine
Answer: C. Insulin
Rationale: Insulin promotes glucose uptake into skeletal muscle and adipose
tissue and suppresses hepatic glucose production, thereby lowering circulating
glucose.
2. Which pancreatic cells produce insulin?
A. Alpha cells
B. Beta cells
C. Delta cells
D. PP cells
Answer: B. Beta cells
Rationale: Pancreatic beta cells in the islets of Langerhans synthesize and secrete
insulin in response primarily to elevated blood glucose.
,3. Which pancreatic hormone raises blood glucose?
A. Insulin
B. Somatostatin
C. Glucagon
D. Amylin
Answer: C. Glucagon
Rationale: Glucagon stimulates hepatic glycogenolysis and gluconeogenesis,
increasing circulating glucose during fasting or hypoglycemia.
4. Which laboratory test best reflects average glycemic control over
approximately three months?
A. Fasting glucose
B. Random glucose
C. HbA1c
D. C-peptide
Answer: C. HbA1c
Rationale: Hemoglobin A1c reflects glycation of hemoglobin over the lifespan of
circulating erythrocytes and provides an estimate of longer-term glucose
exposure.
5. Which finding is most characteristic of diabetic ketoacidosis?
A. Severe hypercalcemia
B. Metabolic acidosis with ketones
C. Respiratory alkalosis without ketones
D. Hypernatremia without hyperglycemia
Answer: B. Metabolic acidosis with ketones
Rationale: DKA results from insulin deficiency with increased lipolysis and ketone
production, producing high-anion-gap metabolic acidosis.
,6. Which patient is at greatest risk for diabetic ketoacidosis?
A. Patient with untreated type 1 diabetes
B. Patient with mild hyperlipidemia
C. Patient with controlled hypothyroidism
D. Patient with isolated hypertension
Answer: A. Patient with untreated type 1 diabetes
Rationale: Absolute insulin deficiency in type 1 diabetes promotes uncontrolled
lipolysis and ketogenesis, making DKA particularly likely.
7. Which finding is more characteristic of hyperosmolar hyperglycemic state
than DKA?
A. Marked ketosis
B. Severe hyperosmolarity with minimal ketosis
C. Profound hypoglycemia
D. Low serum glucose
Answer: B. Severe hyperosmolarity with minimal ketosis
Rationale: HHS generally produces profound hyperglycemia and hyperosmolarity
with little or no significant ketoacidosis.
8. What is the initial priority in a patient with severe hyperglycemic
dehydration?
A. Oral calcium
B. Intravenous fluid replacement
C. Thyroid hormone
D. Potassium restriction
Answer: B. Intravenous fluid replacement
Rationale: Significant osmotic diuresis causes major volume depletion. Restoring
circulating volume is a fundamental initial intervention.
, 9. Which symptom strongly suggests hypoglycemia?
A. Diaphoresis and tremor
B. Polyuria only
C. Dry skin
D. Bradykinesia
Answer: A. Diaphoresis and tremor
Rationale: Adrenergic activation during hypoglycemia causes sweating, tremor,
palpitations, anxiety, and hunger before neuroglycopenic symptoms develop.
10. Which treatment is appropriate for a conscious patient with symptomatic
mild hypoglycemia?
A. Fast-acting carbohydrate
B. Long-acting insulin
C. Fluid restriction
D. Potassium supplementation
Answer: A. Fast-acting carbohydrate
Rationale: A conscious patient able to swallow should receive rapidly absorbed
carbohydrate to raise blood glucose promptly.
11. Which thyroid hormone is biologically most active at the tissue level?
A. T4
B. T3
C. Reverse T3
D. Thyroglobulin
Answer: B. T3
Rationale: Triiodothyronine has greater biological activity than thyroxine. Much
circulating T3 is generated through peripheral conversion of T4.
