ATI RN
Cardiovascular System Quiz Questions Questions
Question 1 of 5
The average life span of an erythrocyte in the circulation is
Correct Answer: D
Rationale: Erythrocytes (D) live ~120 days, removed by spleen/liver.
Question 2 of 5
A person with only antibody B in his or her plasma would have which blood type?
Correct Answer: A
Rationale: Type A (A) has anti-B antibodies, no B antigen.
Question 3 of 5
After Martha's baby was born, why did the physician apply a gauze dressing for a short time on the umbilical cord and give the baby a dose of vitamin K?
Correct Answer: D
Rationale: Vitamin K (D) aids liver production of clotting factors, often low in newborns; gauze aids hemostasis.
Question 4 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 5 of 5
The substance that stimulates formation of platelets is:
Correct Answer: A
Rationale: Thrombopoietin (A) drives platelet production.