ATI RN
Cardiovascular System Quiz Questions Questions
Question 1 of 5
Substance that combines with calcium to convert fibrinogen to fibrin
Correct Answer: B
Rationale: Thrombin (B) with calcium converts fibrinogen to fibrin.
Question 2 of 5
An ABO mismatched blood transfusion can cause acute renal failure because the
Correct Answer: D
Rationale: Mismatched transfusion lyses RBCs, releasing hemoglobin that clogs kidneys (D).
Question 3 of 5
Venoconstriction increases which of the following?
Correct Answer: D
Rationale: Venoconstriction narrows veins, increasing pressure (A), flow (B), and venous return to the heart (C), thus all (D), aiding circulation.
Question 4 of 5
Which of the following is not important in preventing backflow of blood?
Correct Answer: D
Rationale: Chordae tendineae (A), papillary muscles (B), and AV valves (C) prevent backflow in ventricles. Endocardium (D) lines the heart but doesn’t prevent backflow.
Question 5 of 5
Ventricular relaxation immediately follows
Correct Answer: B
Rationale: Ventricular relaxation (diastole) follows ventricular repolarization (B), marked by the T wave.