ATI RN
Questions About the Cardiovascular System Questions
Question 1 of 5
The upper chambers of the heart
Correct Answer: B
Rationale: The atria (B) are the upper, receiving chambers. Ventricles (A) pump, auricles (C) extend atria, trabeculae (D) are in ventricles.
Question 2 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 3 of 5
Which of the following precursor cells eventually give rise to neutrophils?
Correct Answer: D
Rationale: Myeloblasts (D) form granulocytes like neutrophils. Megakaryoblasts (A) form platelets, proerythroblasts (B) RBCs, T lymphoblasts (C) lymphocytes.
Question 4 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 5 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.