ATI RN
Questions About the Cardiovascular System Questions
Question 1 of 5
Which of the following blood cells is a phagocyte?
Correct Answer: A
Rationale: Neutrophils (A) are phagocytic WBCs, engulfing pathogens. Platelets (B) clot, lymphocytes (C) are immune, erythrocytes (D) transport gases.
Question 2 of 5
A hematocrit of 56% would be an indication of:
Correct Answer: D
Rationale: Hematocrit 56% (D) exceeds normal (~45%), indicating polycythemia (excess RBCs).
Question 3 of 5
People with type AB blood are considered universal recipients because their blood:
Correct Answer: B
Rationale: Type AB (B) lacks anti-A/B antibodies, accepting all ABO types.
Question 4 of 5
Which characteristic of blood makes it especially effective in temperature regulation?
Correct Answer: B
Rationale: Blood’s high specific heat (B) absorbs/distributes heat effectively.
Question 5 of 5
Small, colorless bodies that function in blood clotting and hemostasis
Correct Answer: B
Rationale: Platelets (B) initiate clotting and hemostasis.