NCCAOM Biomedicine Board Exam
Question 1
A 35-year-old patient presents with a history of recurrent urinary tract infections. What is
the primary mechanism of action of trimethoprim-sulfamethoxazole in treating this
condition?
A. Inhibiting cell wall synthesis
B. Interfering with protein synthesis
C. Inhibiting folic acid synthesis
D. Disrupting cell membrane integrity
Correct Answer
C. Inhibiting folic acid synthesis
Rationale:
Trimethoprim-sulfamethoxazole works by inhibiting the synthesis of folic acid, which is
essential for bacterial growth and replication.
Question 2
A patient with a history of hypertension is prescribed atenolol. What is the primary
mechanism of action of this medication?
A. Blocking beta-1 receptors in the heart
B. Inhibiting the reabsorption of sodium in the kidneys
C. Dilating blood vessels to reduce peripheral resistance
D. Enhancing the activity of the parasympathetic nervous system
Correct Answer
A. Blocking beta-1 receptors in the heart
Rationale:
Atenolol is a beta-1 selective blocker that reduces heart rate and contractility, thereby
lowering blood pressure.
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,Question 3
A 40-year-old patient presents with symptoms of hyperthyroidism. What is the primary
function of the thyroid-stimulating hormone (TSH) in this condition?
A. Stimulating the release of thyroid hormones
B. Inhibiting the production of thyroid hormones
C. Regulating the metabolism of thyroid hormones
D. Enhancing the absorption of iodine
Correct Answer
A. Stimulating the release of thyroid hormones
Rationale:
TSH stimulates the thyroid gland to release thyroid hormones, and in hyperthyroidism, TSH
levels are typically decreased due to negative feedback.
Question 4
A patient with a history of diabetes mellitus type 2 is prescribed metformin. What is the
primary mechanism of action of this medication?
A. Stimulating insulin release from the pancreas
B. Increasing the sensitivity of peripheral tissues to insulin
C. Inhibiting the production of glucose in the liver
D. Enhancing the absorption of glucose from the gut
Correct Answer
B. Increasing the sensitivity of peripheral tissues to insulin
Rationale:
Metformin increases the sensitivity of peripheral tissues to insulin, thereby reducing
glucose levels in the blood.
Question 5
A patient presents with symptoms of anaphylaxis. What is the primary treatment for this
condition?
A. Administering antihistamines
B. Providing oxygen therapy
C. Injecting epinephrine
D. Giving corticosteroids
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,Correct Answer
C. Injecting epinephrine
Rationale:
Epinephrine is the primary treatment for anaphylaxis, as it rapidly reverses the symptoms
of this life-threatening condition.
Question 6
A patient with a history of coronary artery disease is prescribed simvastatin. What is the
primary mechanism of action of this medication?
A. Inhibiting the production of cholesterol in the liver
B. Increasing the excretion of cholesterol in the bile
C. Reducing the absorption of cholesterol from the gut
D. Enhancing the activity of lipoprotein lipase
Correct Answer
A. Inhibiting the production of cholesterol in the liver
Rationale:
Simvastatin is a statin that inhibits the production of cholesterol in the liver, thereby
reducing the levels of low-density lipoprotein (LDL) cholesterol.
Question 7
A patient presents with symptoms of asthma. What is the primary mechanism of action
of inhaled corticosteroids in treating this condition?
A. Reducing inflammation in the airways
B. Relaxing bronchial smooth muscle
C. Increasing the production of mucus
D. Enhancing the activity of the parasympathetic nervous system
Correct Answer
A. Reducing inflammation in the airways
Rationale:
Inhaled corticosteroids reduce inflammation in the airways, which is a key component of
asthma pathophysiology.
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, Question 8
A patient with a history of chronic kidney disease is prescribed erythropoietin. What is
the primary mechanism of action of this medication?
A. Stimulating the production of red blood cells
B. Inhibiting the production of white blood cells
C. Enhancing the activity of platelets
D. Reducing the levels of urea in the blood
Correct Answer
A. Stimulating the production of red blood cells
Rationale:
Erythropoietin stimulates the production of red blood cells, which helps to correct anemia in
patients with chronic kidney disease.
Question 9
A patient presents with symptoms of community-acquired pneumonia. What is the
primary treatment for this condition?
A. Administering antiviral medications
B. Providing oxygen therapy
C. Prescribing antibiotics
D. Giving corticosteroids
Correct Answer
C. Prescribing antibiotics
Rationale:
Antibiotics are the primary treatment for community-acquired pneumonia, as they target the
bacterial pathogens that cause this condition.
Question 10
A patient with a history of osteoporosis is prescribed alendronate. What is the primary
mechanism of action of this medication?
A. Inhibiting the activity of osteoclasts
B. Stimulating the activity of osteoblasts
C. Increasing the absorption of calcium from the gut
D. Reducing the excretion of calcium in the urine
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Question 1
A 35-year-old patient presents with a history of recurrent urinary tract infections. What is
the primary mechanism of action of trimethoprim-sulfamethoxazole in treating this
condition?
A. Inhibiting cell wall synthesis
B. Interfering with protein synthesis
C. Inhibiting folic acid synthesis
D. Disrupting cell membrane integrity
Correct Answer
C. Inhibiting folic acid synthesis
Rationale:
Trimethoprim-sulfamethoxazole works by inhibiting the synthesis of folic acid, which is
essential for bacterial growth and replication.
Question 2
A patient with a history of hypertension is prescribed atenolol. What is the primary
mechanism of action of this medication?
A. Blocking beta-1 receptors in the heart
B. Inhibiting the reabsorption of sodium in the kidneys
C. Dilating blood vessels to reduce peripheral resistance
D. Enhancing the activity of the parasympathetic nervous system
Correct Answer
A. Blocking beta-1 receptors in the heart
Rationale:
Atenolol is a beta-1 selective blocker that reduces heart rate and contractility, thereby
lowering blood pressure.
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,Question 3
A 40-year-old patient presents with symptoms of hyperthyroidism. What is the primary
function of the thyroid-stimulating hormone (TSH) in this condition?
A. Stimulating the release of thyroid hormones
B. Inhibiting the production of thyroid hormones
C. Regulating the metabolism of thyroid hormones
D. Enhancing the absorption of iodine
Correct Answer
A. Stimulating the release of thyroid hormones
Rationale:
TSH stimulates the thyroid gland to release thyroid hormones, and in hyperthyroidism, TSH
levels are typically decreased due to negative feedback.
Question 4
A patient with a history of diabetes mellitus type 2 is prescribed metformin. What is the
primary mechanism of action of this medication?
A. Stimulating insulin release from the pancreas
B. Increasing the sensitivity of peripheral tissues to insulin
C. Inhibiting the production of glucose in the liver
D. Enhancing the absorption of glucose from the gut
Correct Answer
B. Increasing the sensitivity of peripheral tissues to insulin
Rationale:
Metformin increases the sensitivity of peripheral tissues to insulin, thereby reducing
glucose levels in the blood.
Question 5
A patient presents with symptoms of anaphylaxis. What is the primary treatment for this
condition?
A. Administering antihistamines
B. Providing oxygen therapy
C. Injecting epinephrine
D. Giving corticosteroids
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,Correct Answer
C. Injecting epinephrine
Rationale:
Epinephrine is the primary treatment for anaphylaxis, as it rapidly reverses the symptoms
of this life-threatening condition.
Question 6
A patient with a history of coronary artery disease is prescribed simvastatin. What is the
primary mechanism of action of this medication?
A. Inhibiting the production of cholesterol in the liver
B. Increasing the excretion of cholesterol in the bile
C. Reducing the absorption of cholesterol from the gut
D. Enhancing the activity of lipoprotein lipase
Correct Answer
A. Inhibiting the production of cholesterol in the liver
Rationale:
Simvastatin is a statin that inhibits the production of cholesterol in the liver, thereby
reducing the levels of low-density lipoprotein (LDL) cholesterol.
Question 7
A patient presents with symptoms of asthma. What is the primary mechanism of action
of inhaled corticosteroids in treating this condition?
A. Reducing inflammation in the airways
B. Relaxing bronchial smooth muscle
C. Increasing the production of mucus
D. Enhancing the activity of the parasympathetic nervous system
Correct Answer
A. Reducing inflammation in the airways
Rationale:
Inhaled corticosteroids reduce inflammation in the airways, which is a key component of
asthma pathophysiology.
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, Question 8
A patient with a history of chronic kidney disease is prescribed erythropoietin. What is
the primary mechanism of action of this medication?
A. Stimulating the production of red blood cells
B. Inhibiting the production of white blood cells
C. Enhancing the activity of platelets
D. Reducing the levels of urea in the blood
Correct Answer
A. Stimulating the production of red blood cells
Rationale:
Erythropoietin stimulates the production of red blood cells, which helps to correct anemia in
patients with chronic kidney disease.
Question 9
A patient presents with symptoms of community-acquired pneumonia. What is the
primary treatment for this condition?
A. Administering antiviral medications
B. Providing oxygen therapy
C. Prescribing antibiotics
D. Giving corticosteroids
Correct Answer
C. Prescribing antibiotics
Rationale:
Antibiotics are the primary treatment for community-acquired pneumonia, as they target the
bacterial pathogens that cause this condition.
Question 10
A patient with a history of osteoporosis is prescribed alendronate. What is the primary
mechanism of action of this medication?
A. Inhibiting the activity of osteoclasts
B. Stimulating the activity of osteoblasts
C. Increasing the absorption of calcium from the gut
D. Reducing the excretion of calcium in the urine
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