, TABLE OF CONTENT
PART I: Basic Principles of Physiology and Chapter 27: Physiology of Blood and
Pharmacology Hemostasis
Chapter 1: Basic Principles of Physiology Chapter 28: Blood Products and Blood
Chapter 2: Basic Principles of Components
Pharmacology Chapter 29: Procoagulants
PART II: Neurologic System Chapter 30: Anticoagulants
Chapter 3: Neurophysiology Chapter 31: Physiology and Management
Chapter 4: Inhaled Anesthetics of Massive Transfusion
Chapter 5: Intravenous Sedatives and PART VI: Gastrointestinal System and
Hypnotics Metabolism
Chapter 6: Pain Physiology Chapter 32: Gastrointestinal Physiology
Chapter 7: Opioid Agonists and Chapter 33: Metabolism
Antagonists Chapter 34: Antiemetics
Chapter 8: Centrally Acting Nonopioid Chapter 35: Antacids and
Analgesics Gastrointestinal Motility Drugs
Chapter 9: Peripherally Acting Analgesics Chapter 36: Nutrition
Chapter 10: Local Anesthetics PART VII: Endocrine System
Chapter 11: Neuromuscular Physiology Chapter 37: Normal Endocrine Function
Chapter 12: Neuromuscular-Blocking Chapter 38: Drugs that Alter Glucose
Drugs and Reversal Agents Regulation
Chapter 13: Neurologically Active Drugs Chapter 39: Drugs for the Treatment of
PART III: Circulatory System Hypothyroidism and Hyperthyroidism
Chapter 14: Circulatory Physiology Chapter 40: Other Endocrine Drugs
Chapter 15: Cardiac Physiology PART VIII: Miscellaneous
Chapter 16: Renal Physiology Chapter 41: Antimicrobials, Antiseptics,
Chapter 17: Intravenous Fluids and Disinfectants, and Management of
Electrolytes Perioperative Infection
Chapter 18: Sympathomimetic Drugs Chapter 42: Chemotherapeutic Drugs
Chapter 19: Sympatholytics Chapter 43: Psychopharmacologic Drugs
Chapter 20: Vasodilators PART IX: Special Populations
Chapter 21: Antiarrhythmic Drugs Chapter 44: Physiology of the Newborn
Chapter 22: Diuretics Chapter 45: Maternal and Fetal
Chapter 23: Lipid-Lowering Drugs Physiology and Pharmacology
PART IV: Pulmonary System Chapter 46: Physiology and
Chapter 24: Gas Exchange Pharmacology of the Elderly
Chapter 25: Respiratory Pharmacology Chapter 47: Physiology and
Chapter 26: Acid–Base Disorders Pharmacology of Resuscitation
PART V: Blood and Hemostasis
,Chapter 1: Basic Principles of Physiology
1. What proportion of total body water is contained within the intracellular fluid compartment?
A. One-fourth of total body water
B. One-third of total body water
C. Two-thirds of total body water
D. Three-fourths of total body water
Answer: C
Rationale: Intracellular fluid constitutes approximately two-thirds (67%) of total body water in a healthy adult.
The remaining one-third forms the extracellular fluid volume, which is further partitioned between the interstitial
and intravascular spaces.
Keywords: body fluid compartments, intracellular fluid, total body water
2. What average blood volume is estimated for a healthy non-obese adult male?
A. Seventy milliliters per kilogram
B. Eighty-five milliliters per kilogram
C. Fifty-five milliliters per kilogram
D. One hundred milliliters per kilogram
Answer: A
Rationale: Average adult male blood volume is approximately 70 mL/kg (ranging from 70 to 75 mL/kg), whereas
adult females average 65 mL/kg due to higher relative body fat. In contrast, neonates possess a higher blood
volume of approximately 80 to 85 mL/kg.
Keywords: blood volume estimation, intravascular volume, physiologic parameters
3. A patient receives rapid infusion of five percent dextrose in water. How does this solution behave physiologically
once glucose is metabolized?
,A. It remains entirely within the plasma vascular space
B. It shifts water exclusively into the interstitial space
C. It acts as a hypertonic expander of extracellular fluid
D. It distributes proportionally across all fluid compartments
Answer: D
Rationale: Five percent dextrose in water is initially iso-osmolar in the bag, but rapid cellular uptake and
metabolism of glucose leaves free water behind. This hypotonic free water distributes across both intracellular and
extracellular compartments in proportion to their baseline volumes.
Keywords: dextrose solution, fluid distribution, tonicity
4. Infusion of three liters of zero-point-nine percent normal saline during surgery leads to which metabolic
disturbance?
A. Hypochloremic metabolic alkalosis with hypokalemia
B. Hyperchloremic normal anion gap metabolic acidosis
C. Elevated anion gap lactic acidemic acidosis
D. Hypoosmolar dilutional metabolic alkalosis
Answer: B
Rationale: Normal saline contains 154 mEq/L of sodium and chloride, presenting a supra-physiologic chloride
concentration relative to plasma. Rapid high-volume infusion forces excess chloride into circulation, reducing the
strong ion difference and causing hyperchloremic metabolic acidosis.
Keywords: normal saline, hyperchloremic acidosis, crystalloids
5. A surgical patient with acute hypovolemic shock receives massive crystalloid resuscitation. Capillary endothelial
glycocalyx degradation occurs, leading to severe interstitial edema. Which Starling force alteration primarily
accelerates this fluid extravasation?
A. Increased capillary hydraulic permeability with reduced oncotic pressure gradient
B. Marked elevation of interstitial hydrostatic pressure opposing capillary outward filtration
C. Suppression of precapillary arteriolar tone with increased interstitial protein clearance
D. Direct stimulation of lymphatic pump frequency exceeding total microvascular transudation
,Answer: A
Rationale: Degradation of the endothelial glycocalyx combined with large-volume crystalloid hemodilution
diminishes intravascular oncotic pressure while dramatically increasing capillary reflection coefficient
permeability. This collapses the effective oncotic gradient across the microvascular barrier, driving accelerated
fluid movement into the interstitial space.
Keywords: Starling forces, glycocalyx degradation, interstitial edema
6. Which organelle executes the post-translational modification and sorting of synthesized secretory proteins?
A. The smooth endoplasmic reticulum
B. The primary peroxisome vesicle
C. The Golgi apparatus complex
D. The inner mitochondrial matrix
Answer: C
Rationale: The Golgi apparatus receives newly synthesized proteins from the rough endoplasmic reticulum and
directs their glycosylation, phosphorylation, and proteolytic cleavage. It subsequently packages these processed
macromolecules into secretory vesicles for exocytosis or lysosomal delivery.
Keywords: Golgi apparatus, protein modification, organelle function
7. What stoichiometric ratio of ions does the primary active sodium-potassium ATPase pump transport per
consumed ATP molecule?
A. Two sodium ions outward for three potassium ions inward
B. Three sodium ions outward for two potassium ions inward
C. Three sodium ions inward for two potassium ions outward
D. One sodium ion outward for one potassium ion inward
Answer: B
Rationale: The plasma membrane Na+/K+-ATPase pump hydrolyzes one molecule of intracellular ATP to export
three sodium ions while importing two potassium ions. This electrogenic action maintains the resting membrane
potential and cellular osmotic stability.
Keywords: sodium potassium pump, active transport, membrane potential
,8. Prolonged fasting and dehydration in an elderly surgical patient increases serum sodium to one hundred fifty-
two milliequivalents per liter. How does this hypertonic state impact red blood cell morphology?
A. Cellular swelling and accelerated osmotic lysis
B. Retention of normal biconcave discoid dimensions
C. Increased intracellular water and membrane stretching
D. Osmotic crenation from intracellular water depletion
Answer: D
Rationale: Hypernatremia raises extracellular fluid osmolarity above the intracellular level, establishing an
osmotic gradient that draws water out of erythrocytes. Loss of intracellular volume results in cell shrinkage and
crenation, altering microvascular rheology.
Keywords: hypernatremia, osmotic crenation, erythrocyte mechanics
9. During hepatic resection, a patient experiences acute blood loss exceeding two liters. Which compensatory
transcapillary fluid shift occurs immediately to sustain plasma volume?
A. Fluid autotransfusion from the interstitial space into the intravascular space
B. Bulk transfer of intracellular volume directly across the plasma membrane
C. Precapillary vasodilation promoting outward transudation of albumin
D. Arrest of lymphatic return to retain tissue hydrostatic pressure
Answer: A
Rationale: Severe acute hemorrhage lowers capillary hydrostatic pressure via reflex precapillary arteriolar
vasoconstriction. This reduction in outward filtration pressure favors inward reabsorption of protein-free
interstitial fluid into the vascular lumen, a process termed physiologic autotransfusion.
Keywords: transcapillary refill, hemorrhagic shock, volume regulation
10. An intensive care patient with septic shock exhibits profound cellular bioenergetic failure despite adequate
arterial oxygenation. Laboratory analysis reveals severe lactic acidosis and impaired cytochrome c oxidase activity.
Which underlying organelle pathobiology is responsible?
,A. Ribosomal dissociation along the rough endoplasmic reticulum
B. Lysosomal membrane permeabilization releasing acid hydrolases
C. Mitochondrial electron transport chain complex IV inhibition
D. Peroxisomal fatty acid beta-oxidation enzyme saturation
Answer: C
Rationale: Septic shock induces mitochondrial dysfunction characterized by nitric oxide and reactive oxygen
species inhibition of electron transport complexes, notably complex IV (cytochrome c oxidase). This halts oxidative
phosphorylation, uncouples aerobic respiration, and drives pyruvate conversion to lactate despite preserved
oxygen delivery.
Keywords: mitochondrial bioenergetics, cytochrome oxidase, septic shock
11. Which cellular organelle possesses enzymes responsible for steroid hormone synthesis and cytochrome P450
drug biotransformation?
A. The rough endoplasmic reticulum
B. The smooth endoplasmic reticulum
C. The trans-Golgi vesicular network
D. The secondary lysosome compartment
Answer: B
Rationale: The smooth endoplasmic reticulum lacks ribosomes and contains enzymes dedicated to lipid and
steroid biosynthesis, glycogenolysis, and xenobiotic metabolism via cytochrome P450 mixed-function oxidases. In
striated muscle cells, specialized smooth endoplasmic reticulum functions as the sarcoplasmic reticulum for
calcium storage.
Keywords: smooth endoplasmic reticulum, drug biotransformation, organelle function
12. What is the primary mechanism of passive glucose entry across the plasma membrane of skeletal muscle cells?
A. Simple nonpolar passive diffusion
B. Primary adenosine triphosphate cleavage
C. Sodium-dependent active symport
D. Carrier-mediated facilitated diffusion
, Answer: D
Rationale: Glucose enters skeletal muscle cells via facilitated diffusion mediated by specific membrane transporter
proteins (GLUT4) down a favorable concentration gradient. This transport mechanism does not require direct or
indirect metabolic energy expenditure, but is saturable and regulated by insulin.
Keywords: facilitated diffusion, glucose transporters, membrane transport
13. A patient with head trauma develops acute cerebral edema. Administration of three percent hypertonic saline
reduces intracranial pressure primarily through which physiologic mechanism?
A. Direct pharmacologic constriction of pial cerebral arterioles
B. Osmotic extraction of free water across an intact blood-brain barrier
C. Rapid inhibition of sodium-potassium ATPase pumps in astrocytes
D. Accelerated bulk filtration of cerebrospinal fluid via choroid plexus
Answer: B
Rationale: Hypertonic saline (3% NaCl, osmolarity ~1026 mOsm/L) elevates plasma osmolarity above brain
parenchymal tissue. Because the intact blood-brain barrier has a high reflection coefficient for sodium and
chloride, an effective osmotic gradient draws water out of swollen brain tissue into the circulation.
Keywords: hypertonic saline, cerebral edema, blood-brain barrier
14. Administration of two liters of Lactated Ringer solution alters extracellular fluid electrolytes. Which
constituent in this solution prevents metabolic acidosis?
A. Sodium lactate metabolized into bicarbonate in the liver
B. Excess chloride ions stimulating renal hydrogen excretion
C. High concentrations of free extracellular phosphate buffers
D. Direct binding of hydrogen ions by uncharged calcium salts
Answer: A
Rationale: Lactated Ringer solution contains 28 mEq/L of sodium lactate. In patients with functional hepatic
perfusion and metabolism, lactate is oxidized into bicarbonate, generating an alkalinizing effect that mitigates
hyperchloremic dilutional acidosis.
Keywords: Lactated Ringer, lactate metabolism, buffer systems
PART I: Basic Principles of Physiology and Chapter 27: Physiology of Blood and
Pharmacology Hemostasis
Chapter 1: Basic Principles of Physiology Chapter 28: Blood Products and Blood
Chapter 2: Basic Principles of Components
Pharmacology Chapter 29: Procoagulants
PART II: Neurologic System Chapter 30: Anticoagulants
Chapter 3: Neurophysiology Chapter 31: Physiology and Management
Chapter 4: Inhaled Anesthetics of Massive Transfusion
Chapter 5: Intravenous Sedatives and PART VI: Gastrointestinal System and
Hypnotics Metabolism
Chapter 6: Pain Physiology Chapter 32: Gastrointestinal Physiology
Chapter 7: Opioid Agonists and Chapter 33: Metabolism
Antagonists Chapter 34: Antiemetics
Chapter 8: Centrally Acting Nonopioid Chapter 35: Antacids and
Analgesics Gastrointestinal Motility Drugs
Chapter 9: Peripherally Acting Analgesics Chapter 36: Nutrition
Chapter 10: Local Anesthetics PART VII: Endocrine System
Chapter 11: Neuromuscular Physiology Chapter 37: Normal Endocrine Function
Chapter 12: Neuromuscular-Blocking Chapter 38: Drugs that Alter Glucose
Drugs and Reversal Agents Regulation
Chapter 13: Neurologically Active Drugs Chapter 39: Drugs for the Treatment of
PART III: Circulatory System Hypothyroidism and Hyperthyroidism
Chapter 14: Circulatory Physiology Chapter 40: Other Endocrine Drugs
Chapter 15: Cardiac Physiology PART VIII: Miscellaneous
Chapter 16: Renal Physiology Chapter 41: Antimicrobials, Antiseptics,
Chapter 17: Intravenous Fluids and Disinfectants, and Management of
Electrolytes Perioperative Infection
Chapter 18: Sympathomimetic Drugs Chapter 42: Chemotherapeutic Drugs
Chapter 19: Sympatholytics Chapter 43: Psychopharmacologic Drugs
Chapter 20: Vasodilators PART IX: Special Populations
Chapter 21: Antiarrhythmic Drugs Chapter 44: Physiology of the Newborn
Chapter 22: Diuretics Chapter 45: Maternal and Fetal
Chapter 23: Lipid-Lowering Drugs Physiology and Pharmacology
PART IV: Pulmonary System Chapter 46: Physiology and
Chapter 24: Gas Exchange Pharmacology of the Elderly
Chapter 25: Respiratory Pharmacology Chapter 47: Physiology and
Chapter 26: Acid–Base Disorders Pharmacology of Resuscitation
PART V: Blood and Hemostasis
,Chapter 1: Basic Principles of Physiology
1. What proportion of total body water is contained within the intracellular fluid compartment?
A. One-fourth of total body water
B. One-third of total body water
C. Two-thirds of total body water
D. Three-fourths of total body water
Answer: C
Rationale: Intracellular fluid constitutes approximately two-thirds (67%) of total body water in a healthy adult.
The remaining one-third forms the extracellular fluid volume, which is further partitioned between the interstitial
and intravascular spaces.
Keywords: body fluid compartments, intracellular fluid, total body water
2. What average blood volume is estimated for a healthy non-obese adult male?
A. Seventy milliliters per kilogram
B. Eighty-five milliliters per kilogram
C. Fifty-five milliliters per kilogram
D. One hundred milliliters per kilogram
Answer: A
Rationale: Average adult male blood volume is approximately 70 mL/kg (ranging from 70 to 75 mL/kg), whereas
adult females average 65 mL/kg due to higher relative body fat. In contrast, neonates possess a higher blood
volume of approximately 80 to 85 mL/kg.
Keywords: blood volume estimation, intravascular volume, physiologic parameters
3. A patient receives rapid infusion of five percent dextrose in water. How does this solution behave physiologically
once glucose is metabolized?
,A. It remains entirely within the plasma vascular space
B. It shifts water exclusively into the interstitial space
C. It acts as a hypertonic expander of extracellular fluid
D. It distributes proportionally across all fluid compartments
Answer: D
Rationale: Five percent dextrose in water is initially iso-osmolar in the bag, but rapid cellular uptake and
metabolism of glucose leaves free water behind. This hypotonic free water distributes across both intracellular and
extracellular compartments in proportion to their baseline volumes.
Keywords: dextrose solution, fluid distribution, tonicity
4. Infusion of three liters of zero-point-nine percent normal saline during surgery leads to which metabolic
disturbance?
A. Hypochloremic metabolic alkalosis with hypokalemia
B. Hyperchloremic normal anion gap metabolic acidosis
C. Elevated anion gap lactic acidemic acidosis
D. Hypoosmolar dilutional metabolic alkalosis
Answer: B
Rationale: Normal saline contains 154 mEq/L of sodium and chloride, presenting a supra-physiologic chloride
concentration relative to plasma. Rapid high-volume infusion forces excess chloride into circulation, reducing the
strong ion difference and causing hyperchloremic metabolic acidosis.
Keywords: normal saline, hyperchloremic acidosis, crystalloids
5. A surgical patient with acute hypovolemic shock receives massive crystalloid resuscitation. Capillary endothelial
glycocalyx degradation occurs, leading to severe interstitial edema. Which Starling force alteration primarily
accelerates this fluid extravasation?
A. Increased capillary hydraulic permeability with reduced oncotic pressure gradient
B. Marked elevation of interstitial hydrostatic pressure opposing capillary outward filtration
C. Suppression of precapillary arteriolar tone with increased interstitial protein clearance
D. Direct stimulation of lymphatic pump frequency exceeding total microvascular transudation
,Answer: A
Rationale: Degradation of the endothelial glycocalyx combined with large-volume crystalloid hemodilution
diminishes intravascular oncotic pressure while dramatically increasing capillary reflection coefficient
permeability. This collapses the effective oncotic gradient across the microvascular barrier, driving accelerated
fluid movement into the interstitial space.
Keywords: Starling forces, glycocalyx degradation, interstitial edema
6. Which organelle executes the post-translational modification and sorting of synthesized secretory proteins?
A. The smooth endoplasmic reticulum
B. The primary peroxisome vesicle
C. The Golgi apparatus complex
D. The inner mitochondrial matrix
Answer: C
Rationale: The Golgi apparatus receives newly synthesized proteins from the rough endoplasmic reticulum and
directs their glycosylation, phosphorylation, and proteolytic cleavage. It subsequently packages these processed
macromolecules into secretory vesicles for exocytosis or lysosomal delivery.
Keywords: Golgi apparatus, protein modification, organelle function
7. What stoichiometric ratio of ions does the primary active sodium-potassium ATPase pump transport per
consumed ATP molecule?
A. Two sodium ions outward for three potassium ions inward
B. Three sodium ions outward for two potassium ions inward
C. Three sodium ions inward for two potassium ions outward
D. One sodium ion outward for one potassium ion inward
Answer: B
Rationale: The plasma membrane Na+/K+-ATPase pump hydrolyzes one molecule of intracellular ATP to export
three sodium ions while importing two potassium ions. This electrogenic action maintains the resting membrane
potential and cellular osmotic stability.
Keywords: sodium potassium pump, active transport, membrane potential
,8. Prolonged fasting and dehydration in an elderly surgical patient increases serum sodium to one hundred fifty-
two milliequivalents per liter. How does this hypertonic state impact red blood cell morphology?
A. Cellular swelling and accelerated osmotic lysis
B. Retention of normal biconcave discoid dimensions
C. Increased intracellular water and membrane stretching
D. Osmotic crenation from intracellular water depletion
Answer: D
Rationale: Hypernatremia raises extracellular fluid osmolarity above the intracellular level, establishing an
osmotic gradient that draws water out of erythrocytes. Loss of intracellular volume results in cell shrinkage and
crenation, altering microvascular rheology.
Keywords: hypernatremia, osmotic crenation, erythrocyte mechanics
9. During hepatic resection, a patient experiences acute blood loss exceeding two liters. Which compensatory
transcapillary fluid shift occurs immediately to sustain plasma volume?
A. Fluid autotransfusion from the interstitial space into the intravascular space
B. Bulk transfer of intracellular volume directly across the plasma membrane
C. Precapillary vasodilation promoting outward transudation of albumin
D. Arrest of lymphatic return to retain tissue hydrostatic pressure
Answer: A
Rationale: Severe acute hemorrhage lowers capillary hydrostatic pressure via reflex precapillary arteriolar
vasoconstriction. This reduction in outward filtration pressure favors inward reabsorption of protein-free
interstitial fluid into the vascular lumen, a process termed physiologic autotransfusion.
Keywords: transcapillary refill, hemorrhagic shock, volume regulation
10. An intensive care patient with septic shock exhibits profound cellular bioenergetic failure despite adequate
arterial oxygenation. Laboratory analysis reveals severe lactic acidosis and impaired cytochrome c oxidase activity.
Which underlying organelle pathobiology is responsible?
,A. Ribosomal dissociation along the rough endoplasmic reticulum
B. Lysosomal membrane permeabilization releasing acid hydrolases
C. Mitochondrial electron transport chain complex IV inhibition
D. Peroxisomal fatty acid beta-oxidation enzyme saturation
Answer: C
Rationale: Septic shock induces mitochondrial dysfunction characterized by nitric oxide and reactive oxygen
species inhibition of electron transport complexes, notably complex IV (cytochrome c oxidase). This halts oxidative
phosphorylation, uncouples aerobic respiration, and drives pyruvate conversion to lactate despite preserved
oxygen delivery.
Keywords: mitochondrial bioenergetics, cytochrome oxidase, septic shock
11. Which cellular organelle possesses enzymes responsible for steroid hormone synthesis and cytochrome P450
drug biotransformation?
A. The rough endoplasmic reticulum
B. The smooth endoplasmic reticulum
C. The trans-Golgi vesicular network
D. The secondary lysosome compartment
Answer: B
Rationale: The smooth endoplasmic reticulum lacks ribosomes and contains enzymes dedicated to lipid and
steroid biosynthesis, glycogenolysis, and xenobiotic metabolism via cytochrome P450 mixed-function oxidases. In
striated muscle cells, specialized smooth endoplasmic reticulum functions as the sarcoplasmic reticulum for
calcium storage.
Keywords: smooth endoplasmic reticulum, drug biotransformation, organelle function
12. What is the primary mechanism of passive glucose entry across the plasma membrane of skeletal muscle cells?
A. Simple nonpolar passive diffusion
B. Primary adenosine triphosphate cleavage
C. Sodium-dependent active symport
D. Carrier-mediated facilitated diffusion
, Answer: D
Rationale: Glucose enters skeletal muscle cells via facilitated diffusion mediated by specific membrane transporter
proteins (GLUT4) down a favorable concentration gradient. This transport mechanism does not require direct or
indirect metabolic energy expenditure, but is saturable and regulated by insulin.
Keywords: facilitated diffusion, glucose transporters, membrane transport
13. A patient with head trauma develops acute cerebral edema. Administration of three percent hypertonic saline
reduces intracranial pressure primarily through which physiologic mechanism?
A. Direct pharmacologic constriction of pial cerebral arterioles
B. Osmotic extraction of free water across an intact blood-brain barrier
C. Rapid inhibition of sodium-potassium ATPase pumps in astrocytes
D. Accelerated bulk filtration of cerebrospinal fluid via choroid plexus
Answer: B
Rationale: Hypertonic saline (3% NaCl, osmolarity ~1026 mOsm/L) elevates plasma osmolarity above brain
parenchymal tissue. Because the intact blood-brain barrier has a high reflection coefficient for sodium and
chloride, an effective osmotic gradient draws water out of swollen brain tissue into the circulation.
Keywords: hypertonic saline, cerebral edema, blood-brain barrier
14. Administration of two liters of Lactated Ringer solution alters extracellular fluid electrolytes. Which
constituent in this solution prevents metabolic acidosis?
A. Sodium lactate metabolized into bicarbonate in the liver
B. Excess chloride ions stimulating renal hydrogen excretion
C. High concentrations of free extracellular phosphate buffers
D. Direct binding of hydrogen ions by uncharged calcium salts
Answer: A
Rationale: Lactated Ringer solution contains 28 mEq/L of sodium lactate. In patients with functional hepatic
perfusion and metabolism, lactate is oxidized into bicarbonate, generating an alkalinizing effect that mitigates
hyperchloremic dilutional acidosis.
Keywords: Lactated Ringer, lactate metabolism, buffer systems
