Question 1:
What is the primary function of the sodium-potassium pump in cellular physiology?
A. Maintain osmotic balance and cell volume
B. Synthesize ATP
C. Transport glucose into the cell
D. Produce hormones
Correct Answer: A. Maintain osmotic balance and cell volume
Rationale: The sodium-potassium pump helps maintain osmotic balance and cell volume by
pumping sodium out of and potassium into the cell, which is crucial for cell function.
Question 2:
Which hormone is primarily responsible for regulating serum calcium levels?
A. Insulin
B. Glucagon
C. Parathyroid hormone
D. Cortisol
Correct Answer: C. Parathyroid hormone
Rationale: Parathyroid hormone (PTH) regulates serum calcium levels by increasing calcium
absorption from the gastrointestinal tract, reabsorption from the kidneys, and release from bones.
Question 3:
Which of the following is a common symptom of hyperthyroidism?
A. Weight gain
B. Bradycardia
C. Heat intolerance
D. Cold intolerance
Correct Answer: C. Heat intolerance
Rationale: Hyperthyroidism increases the body's metabolic rate, leading to heat intolerance,
weight loss, and tachycardia.
,Question 4:
What is the primary cause of edema in heart failure?
A. Increased capillary oncotic pressure
B. Increased capillary hydrostatic pressure
C. Decreased capillary permeability
D. Increased lymphatic drainage
Correct Answer: B. Increased capillary hydrostatic pressure
Rationale: In heart failure, increased capillary hydrostatic pressure due to elevated venous
pressure leads to fluid leakage into the interstitial space, causing edema.
Question 5:
What type of hypersensitivity reaction is anaphylaxis?
A. Type I
B. Type II
C. Type III
D. Type IV
Correct Answer: A. Type I
Rationale: Anaphylaxis is a severe, immediate allergic reaction mediated by IgE antibodies,
characteristic of Type I hypersensitivity.
Question 6:
Which of the following is a characteristic feature of rheumatoid arthritis?
A. Asymmetrical joint involvement
B. Osteophyte formation
C. Synovial inflammation
D. Heberden's nodes
Correct Answer: C. Synovial inflammation
Rationale: Rheumatoid arthritis is characterized by chronic synovial inflammation, leading to
joint pain, swelling, and deformity.
,Question 7:
Which organ is primarily affected in cystic fibrosis?
A. Heart
B. Kidneys
C. Liver
D. Lungs
Correct Answer: D. Lungs
Rationale: Cystic fibrosis primarily affects the lungs, causing thick mucus production that leads
to respiratory infections and decreased lung function.
Question 8:
Which electrolyte imbalance is most likely to cause cardiac arrhythmias?
A. Hypokalemia
B. Hypernatremia
C. Hypocalcemia
D. Hypermagnesemia
Correct Answer: A. Hypokalemia
Rationale: Hypokalemia, or low potassium levels, can disrupt cardiac electrical activity and lead
to arrhythmias.
Question 9:
What is the most common cause of chronic kidney disease?
A. Hypertension
B. Diabetes mellitus
C. Glomerulonephritis
D. Polycystic kidney disease
Correct Answer: B. Diabetes mellitus
Rationale: Diabetes mellitus is the leading cause of chronic kidney disease due to diabetic
nephropathy, which damages the kidneys over time.
, Question 10:
What is the underlying mechanism of type 1 diabetes mellitus?
A. Insulin resistance
B. Autoimmune destruction of pancreatic beta cells
C. Increased hepatic glucose production
D. Decreased glucose uptake by muscles
Correct Answer: B. Autoimmune destruction of pancreatic beta cells
Rationale: Type 1 diabetes mellitus is an autoimmune condition where the body's immune
system destroys insulin-producing beta cells in the pancreas.
Question 11:
Which of the following conditions is characterized by the presence of Reed-Sternberg cells?
A. Non-Hodgkin lymphoma
B. Hodgkin lymphoma
C. Multiple myeloma
D. Chronic lymphocytic leukemia
Correct Answer: B. Hodgkin lymphoma
Rationale: Reed-Sternberg cells are a hallmark of Hodgkin lymphoma, a type of lymphatic
cancer.
Question 12:
Which disorder is characterized by demyelination in the central nervous system?
A. Guillain-Barré syndrome
B. Amyotrophic lateral sclerosis
C. Multiple sclerosis
D. Myasthenia gravis
Correct Answer: C. Multiple sclerosis
Rationale: Multiple sclerosis involves demyelination of neurons in the central nervous system,
leading to neurological symptoms.
Which statement best describes the cellular function of metabolic absorption?
What is the primary function of the sodium-potassium pump in cellular physiology?
A. Maintain osmotic balance and cell volume
B. Synthesize ATP
C. Transport glucose into the cell
D. Produce hormones
Correct Answer: A. Maintain osmotic balance and cell volume
Rationale: The sodium-potassium pump helps maintain osmotic balance and cell volume by
pumping sodium out of and potassium into the cell, which is crucial for cell function.
Question 2:
Which hormone is primarily responsible for regulating serum calcium levels?
A. Insulin
B. Glucagon
C. Parathyroid hormone
D. Cortisol
Correct Answer: C. Parathyroid hormone
Rationale: Parathyroid hormone (PTH) regulates serum calcium levels by increasing calcium
absorption from the gastrointestinal tract, reabsorption from the kidneys, and release from bones.
Question 3:
Which of the following is a common symptom of hyperthyroidism?
A. Weight gain
B. Bradycardia
C. Heat intolerance
D. Cold intolerance
Correct Answer: C. Heat intolerance
Rationale: Hyperthyroidism increases the body's metabolic rate, leading to heat intolerance,
weight loss, and tachycardia.
,Question 4:
What is the primary cause of edema in heart failure?
A. Increased capillary oncotic pressure
B. Increased capillary hydrostatic pressure
C. Decreased capillary permeability
D. Increased lymphatic drainage
Correct Answer: B. Increased capillary hydrostatic pressure
Rationale: In heart failure, increased capillary hydrostatic pressure due to elevated venous
pressure leads to fluid leakage into the interstitial space, causing edema.
Question 5:
What type of hypersensitivity reaction is anaphylaxis?
A. Type I
B. Type II
C. Type III
D. Type IV
Correct Answer: A. Type I
Rationale: Anaphylaxis is a severe, immediate allergic reaction mediated by IgE antibodies,
characteristic of Type I hypersensitivity.
Question 6:
Which of the following is a characteristic feature of rheumatoid arthritis?
A. Asymmetrical joint involvement
B. Osteophyte formation
C. Synovial inflammation
D. Heberden's nodes
Correct Answer: C. Synovial inflammation
Rationale: Rheumatoid arthritis is characterized by chronic synovial inflammation, leading to
joint pain, swelling, and deformity.
,Question 7:
Which organ is primarily affected in cystic fibrosis?
A. Heart
B. Kidneys
C. Liver
D. Lungs
Correct Answer: D. Lungs
Rationale: Cystic fibrosis primarily affects the lungs, causing thick mucus production that leads
to respiratory infections and decreased lung function.
Question 8:
Which electrolyte imbalance is most likely to cause cardiac arrhythmias?
A. Hypokalemia
B. Hypernatremia
C. Hypocalcemia
D. Hypermagnesemia
Correct Answer: A. Hypokalemia
Rationale: Hypokalemia, or low potassium levels, can disrupt cardiac electrical activity and lead
to arrhythmias.
Question 9:
What is the most common cause of chronic kidney disease?
A. Hypertension
B. Diabetes mellitus
C. Glomerulonephritis
D. Polycystic kidney disease
Correct Answer: B. Diabetes mellitus
Rationale: Diabetes mellitus is the leading cause of chronic kidney disease due to diabetic
nephropathy, which damages the kidneys over time.
, Question 10:
What is the underlying mechanism of type 1 diabetes mellitus?
A. Insulin resistance
B. Autoimmune destruction of pancreatic beta cells
C. Increased hepatic glucose production
D. Decreased glucose uptake by muscles
Correct Answer: B. Autoimmune destruction of pancreatic beta cells
Rationale: Type 1 diabetes mellitus is an autoimmune condition where the body's immune
system destroys insulin-producing beta cells in the pancreas.
Question 11:
Which of the following conditions is characterized by the presence of Reed-Sternberg cells?
A. Non-Hodgkin lymphoma
B. Hodgkin lymphoma
C. Multiple myeloma
D. Chronic lymphocytic leukemia
Correct Answer: B. Hodgkin lymphoma
Rationale: Reed-Sternberg cells are a hallmark of Hodgkin lymphoma, a type of lymphatic
cancer.
Question 12:
Which disorder is characterized by demyelination in the central nervous system?
A. Guillain-Barré syndrome
B. Amyotrophic lateral sclerosis
C. Multiple sclerosis
D. Myasthenia gravis
Correct Answer: C. Multiple sclerosis
Rationale: Multiple sclerosis involves demyelination of neurons in the central nervous system,
leading to neurological symptoms.
Which statement best describes the cellular function of metabolic absorption?
