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Which type of shock results from widespread vasodilation?
A. Cardiogenic shock
B. Hypovolemic shock
C. Distributive shock
D. Obstructive shock
C. Distributive shock
Rationale: Distributive shock (e.g., septic, neurogenic) involves systemic
vasodilation and reduced systemic vascular resistance.
,What hormone is released by the posterior pituitary gland in response to
hypovolemia to promote water retention?
A) Aldosterone
B) Epinephrine
C) Antidiuretic hormone (ADH)
D) Cortisol
C) Antidiuretic hormone (ADH)
Rationale: ADH increases water reabsorption in the kidneys to help maintain
blood volume and pressure.
Which of the following clinical signs is most indicative of decompensated shock?
A) Normal blood pressure with tachycardia
B) Decreased urine output with cool, clammy skin
C) Warm, flushed skin with bounding pulses
D) Bradycardia and hypertension
B) Decreased urine output with cool, clammy skin
Rationale: As compensatory mechanisms fail, hypotension, decreased urine
output, and cold, clammy skin indicate worsening shock.
,What metabolic disturbance is commonly seen in decompensated shock due to
tissue hypoxia?
A) Metabolic alkalosis
B) Respiratory alkalosis
C) Metabolic acidosis
D) Respiratory acidosis
C) Metabolic acidosis
Rationale: Inadequate perfusion leads to anaerobic metabolism and lactic acid
buildup, causing metabolic acidosis.
Which of the following conditions is a common cause of cardiogenic shock?
A) Pulmonary embolism
B) Myocardial infarction
C) Severe dehydration
D) Spinal cord injury
B) Myocardial infarction
Rationale: Myocardial infarction leads to decreased myocardial contractility,
reducing cardiac output.
, A patient with cardiogenic shock is most likely to exhibit which hemodynamic
parameter?
A) Increased preload with decreased cardiac output
B) Increased cardiac output with decreased preload
C) Low systemic vascular resistance (SVR)
D) Increased urine output
A) Increased preload with decreased cardiac output
Rationale: In cardiogenic shock, decreased myocardial contractility leads to
increased preload and reduced cardiac output.
Why is excessive fluid administration avoided in cardiogenic shock?
A) It decreases systemic vascular resistance
B) It can worsen pulmonary edema
C) It causes metabolic alkalosis
D) It leads to severe hypertension
B) It can worsen pulmonary edema
Rationale: Excess fluids can increase preload and exacerbate pulmonary
congestion.
Which of the following is the most common cause of anaphylactic shock?
A. Peanuts
B. Cold exposure
C. Emotional stress
D. Hypoglycemia
A. Peanuts
Rationale: Peanuts are one of the most common allergens that trigger
anaphylactic shock. Other common triggers include shellfish, insect stings,
and medications.