,UTA NURS 5315 Final Exam | Advanced Pathophysiology (2026)
Q&A
1. Which of the following best describes the primary consequence of anaerobic metabolism in
shock?
A) Increased oxidative phosphorylation and ATP production
B) Lactic acid accumulation and metabolic acidosis
C) Enhanced clearance of carbon dioxide
D) Reduced production of reactive oxygen species
Correct Answer: Lactic acid accumulation and metabolic acidosis
Rationale: During shock, inadequate tissue perfusion leads to cellular hypoxia, forcing cells
to rely on anaerobic metabolism. This produces less ATP and generates lactic acid as a
byproduct. The accumulation of lactic acid contributes to metabolic acidosis, a hallmark of
severe shock. Oxidative phosphorylation is impaired, not increased, and anaerobic
metabolism does not enhance carbon dioxide clearance.
2. What is the primary mechanism by which severe hemorrhage leads to hypovolemic shock?
A) Widespread vasodilation and decreased systemic vascular resistance
B) Decreased intravascular volume and reduced cardiac output
C) Cardiac pump failure despite normal blood volume
D) Obstruction of blood flow due to a pulmonary embolism
Correct Answer: Decreased intravascular volume and reduced cardiac output
Rationale: Severe hemorrhage causes a loss of intravascular volume, which decreases
venous return and preload. This leads to a reduction in stroke volume and cardiac output,
resulting in inadequate tissue perfusion. Vasodilation is characteristic of distributive shock,
,cardiac pump failure occurs in cardiogenic shock, and obstruction occurs in obstructive
shock.
3. In the context of multiple organ dysfunction syndrome (MODS), what is the primary
underlying pathophysiologic mechanism?
A) Direct infection of each organ by a single pathogen
B) Systemic inflammatory response leading to progressive organ failure
C) Autoimmune attack on multiple organ systems
D) Isolated failure of one organ without systemic involvement
Correct Answer: Systemic inflammatory response leading to progressive organ failure
Rationale: MODS results from a dysregulated systemic inflammatory response, often
triggered by sepsis, trauma, or shock. Inflammatory mediators cause widespread endothelial
damage, microvascular thrombosis, and progressive failure of multiple organs. It is not
caused by direct infection of each organ or an autoimmune attack.
4. A researcher is studying the compensatory mechanisms in shock. Which of the following is
an early compensatory response to decreased cardiac output?
A) Activation of the parasympathetic nervous system
B) Tachycardia and increased systemic vascular resistance
C) Bradycardia and vasodilation
D) Decreased renin and aldosterone secretion
Correct Answer: Tachycardia and increased systemic vascular resistance
Rationale: When cardiac output falls, baroreceptors detect the decrease in blood pressure and
activate the sympathetic nervous system. This leads to tachycardia and increased systemic
vascular resistance to maintain perfusion to vital organs. Bradycardia, vasodilation, and
decreased renin secretion would worsen hypotension.
, 5. What is the most likely consequence of untreated anaphylactic shock?
A) Hypertension and bradycardia
B) Respiratory distress and cardiovascular collapse
C) Increased urine output and polyuria
D) Enhanced immune function and recovery
Correct Answer: Respiratory distress and cardiovascular collapse
Rationale: Anaphylactic shock is a severe systemic hypersensitivity reaction characterized
by widespread vasodilation, increased capillary permeability, bronchoconstriction, and
laryngeal edema. Without prompt treatment with epinephrine, it can lead to respiratory
distress, cardiovascular collapse, and death. It does not cause hypertension or increased urine
output.
6. According to the principles of shock management, what is the primary goal of treatment?
A) Increasing blood pressure without addressing perfusion
B) Restoring adequate tissue perfusion and oxygen delivery
C) Reducing heart rate to decrease myocardial oxygen demand
D) Decreasing urine output to conserve fluid
Correct Answer: Restoring adequate tissue perfusion and oxygen delivery
Rationale: The primary goal in treating shock is to restore adequate tissue perfusion and
oxygen delivery to vital organs. This involves correcting the underlying cause, administering
intravenous fluids, and using vasopressors if needed. Simply increasing blood pressure
without improving perfusion is insufficient, and decreasing urine output is not a therapeutic
goal.
7. Which of the following best describes the primary characteristic of cardiogenic shock?
Q&A
1. Which of the following best describes the primary consequence of anaerobic metabolism in
shock?
A) Increased oxidative phosphorylation and ATP production
B) Lactic acid accumulation and metabolic acidosis
C) Enhanced clearance of carbon dioxide
D) Reduced production of reactive oxygen species
Correct Answer: Lactic acid accumulation and metabolic acidosis
Rationale: During shock, inadequate tissue perfusion leads to cellular hypoxia, forcing cells
to rely on anaerobic metabolism. This produces less ATP and generates lactic acid as a
byproduct. The accumulation of lactic acid contributes to metabolic acidosis, a hallmark of
severe shock. Oxidative phosphorylation is impaired, not increased, and anaerobic
metabolism does not enhance carbon dioxide clearance.
2. What is the primary mechanism by which severe hemorrhage leads to hypovolemic shock?
A) Widespread vasodilation and decreased systemic vascular resistance
B) Decreased intravascular volume and reduced cardiac output
C) Cardiac pump failure despite normal blood volume
D) Obstruction of blood flow due to a pulmonary embolism
Correct Answer: Decreased intravascular volume and reduced cardiac output
Rationale: Severe hemorrhage causes a loss of intravascular volume, which decreases
venous return and preload. This leads to a reduction in stroke volume and cardiac output,
resulting in inadequate tissue perfusion. Vasodilation is characteristic of distributive shock,
,cardiac pump failure occurs in cardiogenic shock, and obstruction occurs in obstructive
shock.
3. In the context of multiple organ dysfunction syndrome (MODS), what is the primary
underlying pathophysiologic mechanism?
A) Direct infection of each organ by a single pathogen
B) Systemic inflammatory response leading to progressive organ failure
C) Autoimmune attack on multiple organ systems
D) Isolated failure of one organ without systemic involvement
Correct Answer: Systemic inflammatory response leading to progressive organ failure
Rationale: MODS results from a dysregulated systemic inflammatory response, often
triggered by sepsis, trauma, or shock. Inflammatory mediators cause widespread endothelial
damage, microvascular thrombosis, and progressive failure of multiple organs. It is not
caused by direct infection of each organ or an autoimmune attack.
4. A researcher is studying the compensatory mechanisms in shock. Which of the following is
an early compensatory response to decreased cardiac output?
A) Activation of the parasympathetic nervous system
B) Tachycardia and increased systemic vascular resistance
C) Bradycardia and vasodilation
D) Decreased renin and aldosterone secretion
Correct Answer: Tachycardia and increased systemic vascular resistance
Rationale: When cardiac output falls, baroreceptors detect the decrease in blood pressure and
activate the sympathetic nervous system. This leads to tachycardia and increased systemic
vascular resistance to maintain perfusion to vital organs. Bradycardia, vasodilation, and
decreased renin secretion would worsen hypotension.
, 5. What is the most likely consequence of untreated anaphylactic shock?
A) Hypertension and bradycardia
B) Respiratory distress and cardiovascular collapse
C) Increased urine output and polyuria
D) Enhanced immune function and recovery
Correct Answer: Respiratory distress and cardiovascular collapse
Rationale: Anaphylactic shock is a severe systemic hypersensitivity reaction characterized
by widespread vasodilation, increased capillary permeability, bronchoconstriction, and
laryngeal edema. Without prompt treatment with epinephrine, it can lead to respiratory
distress, cardiovascular collapse, and death. It does not cause hypertension or increased urine
output.
6. According to the principles of shock management, what is the primary goal of treatment?
A) Increasing blood pressure without addressing perfusion
B) Restoring adequate tissue perfusion and oxygen delivery
C) Reducing heart rate to decrease myocardial oxygen demand
D) Decreasing urine output to conserve fluid
Correct Answer: Restoring adequate tissue perfusion and oxygen delivery
Rationale: The primary goal in treating shock is to restore adequate tissue perfusion and
oxygen delivery to vital organs. This involves correcting the underlying cause, administering
intravenous fluids, and using vasopressors if needed. Simply increasing blood pressure
without improving perfusion is insufficient, and decreasing urine output is not a therapeutic
goal.
7. Which of the following best describes the primary characteristic of cardiogenic shock?
