WGU D115 Advanced Pathophysiology Pre-Assessment
Exam and Study guide Questions (Latest )
and Verified Rationalized Answers, 100% Guarantee
Pass
1. A patient with left-sided heart failure develops dyspnea and crackles. What mechanism
primarily causes these findings?
A. Decreased systemic vascular resistance
B. Increased pulmonary capillary hydrostatic pressure
C. Decreased pulmonary blood flow
D. Increased oncotic pressure
Answer: B
Rationale: Left ventricular dysfunction causes blood to back up into the pulmonary circulation,
increasing pulmonary capillary hydrostatic pressure and promoting pulmonary edema.
2. Which pathophysiologic change is most characteristic of heart failure with reduced ejection
fraction (HFrEF)?
A. Increased ventricular contractility
B. Impaired systolic contraction
C. Reduced ventricular preload
D. Increased myocardial relaxation
,Answer: B
Rationale: HFrEF is primarily characterized by impaired ventricular systolic contraction, resulting
in reduced ejection fraction and inadequate forward cardiac output.
3. A patient with chronic hypertension develops left ventricular hypertrophy. What is the
primary stimulus?
A. Chronic volume depletion
B. Increased afterload
C. Decreased sympathetic activity
D. Reduced systemic vascular resistance
Answer: B
Rationale: Persistent hypertension increases systemic vascular resistance and therefore
ventricular afterload. The left ventricle responds by increasing muscle mass.
4. Which mechanism contributes to atherosclerosis?
A. Endothelial injury and inflammatory processes
B. Complete absence of LDL
C. Increased HDL deposition in arterial walls
D. Reduced platelet activity
Answer: A
,Rationale: Atherosclerosis involves endothelial dysfunction/injury, LDL accumulation and
modification, inflammation, foam-cell formation, and plaque development.
5. A myocardial infarction most commonly results from:
A. Chronic anemia alone
B. Acute coronary artery obstruction
C. Increased venous return
D. Pulmonary hypertension
Answer: B
Rationale: Most acute myocardial infarctions occur when an atherosclerotic plaque ruptures
and triggers thrombus formation, obstructing coronary blood flow.
6. Which biomarker is particularly useful for detecting myocardial injury?
A. Troponin
B. Albumin
C. Bilirubin
D. Amylase
Answer: A
Rationale: Cardiac troponins are highly sensitive and specific biomarkers of myocardial injury.
, 7. Why does chronic hypertension increase the risk of stroke?
A. It permanently decreases cerebral blood flow
B. It damages cerebral blood vessels and promotes vascular disease
C. It eliminates platelet aggregation
D. It prevents atherosclerosis
Answer: B
Rationale: Chronic hypertension damages vascular endothelium and promotes atherosclerosis,
small-vessel disease, aneurysm formation, and both ischemic and hemorrhagic stroke.
Respiratory System
8. What is the fundamental pathophysiologic abnormality in asthma?
A. Irreversible alveolar destruction
B. Reversible airway inflammation and bronchoconstriction
C. Pleural fibrosis
D. Permanent loss of pulmonary blood flow
Answer: B
Rationale: Asthma involves airway inflammation, bronchial hyperresponsiveness,
bronchoconstriction, and mucus production, producing variable and usually reversible airflow
obstruction.
Exam and Study guide Questions (Latest )
and Verified Rationalized Answers, 100% Guarantee
Pass
1. A patient with left-sided heart failure develops dyspnea and crackles. What mechanism
primarily causes these findings?
A. Decreased systemic vascular resistance
B. Increased pulmonary capillary hydrostatic pressure
C. Decreased pulmonary blood flow
D. Increased oncotic pressure
Answer: B
Rationale: Left ventricular dysfunction causes blood to back up into the pulmonary circulation,
increasing pulmonary capillary hydrostatic pressure and promoting pulmonary edema.
2. Which pathophysiologic change is most characteristic of heart failure with reduced ejection
fraction (HFrEF)?
A. Increased ventricular contractility
B. Impaired systolic contraction
C. Reduced ventricular preload
D. Increased myocardial relaxation
,Answer: B
Rationale: HFrEF is primarily characterized by impaired ventricular systolic contraction, resulting
in reduced ejection fraction and inadequate forward cardiac output.
3. A patient with chronic hypertension develops left ventricular hypertrophy. What is the
primary stimulus?
A. Chronic volume depletion
B. Increased afterload
C. Decreased sympathetic activity
D. Reduced systemic vascular resistance
Answer: B
Rationale: Persistent hypertension increases systemic vascular resistance and therefore
ventricular afterload. The left ventricle responds by increasing muscle mass.
4. Which mechanism contributes to atherosclerosis?
A. Endothelial injury and inflammatory processes
B. Complete absence of LDL
C. Increased HDL deposition in arterial walls
D. Reduced platelet activity
Answer: A
,Rationale: Atherosclerosis involves endothelial dysfunction/injury, LDL accumulation and
modification, inflammation, foam-cell formation, and plaque development.
5. A myocardial infarction most commonly results from:
A. Chronic anemia alone
B. Acute coronary artery obstruction
C. Increased venous return
D. Pulmonary hypertension
Answer: B
Rationale: Most acute myocardial infarctions occur when an atherosclerotic plaque ruptures
and triggers thrombus formation, obstructing coronary blood flow.
6. Which biomarker is particularly useful for detecting myocardial injury?
A. Troponin
B. Albumin
C. Bilirubin
D. Amylase
Answer: A
Rationale: Cardiac troponins are highly sensitive and specific biomarkers of myocardial injury.
, 7. Why does chronic hypertension increase the risk of stroke?
A. It permanently decreases cerebral blood flow
B. It damages cerebral blood vessels and promotes vascular disease
C. It eliminates platelet aggregation
D. It prevents atherosclerosis
Answer: B
Rationale: Chronic hypertension damages vascular endothelium and promotes atherosclerosis,
small-vessel disease, aneurysm formation, and both ischemic and hemorrhagic stroke.
Respiratory System
8. What is the fundamental pathophysiologic abnormality in asthma?
A. Irreversible alveolar destruction
B. Reversible airway inflammation and bronchoconstriction
C. Pleural fibrosis
D. Permanent loss of pulmonary blood flow
Answer: B
Rationale: Asthma involves airway inflammation, bronchial hyperresponsiveness,
bronchoconstriction, and mucus production, producing variable and usually reversible airflow
obstruction.
