ATI RN
Cardiovascular System Assessment Questions Questions
Question 1 of 5
The muscle layer of the heart
Correct Answer: C
Rationale: The myocardium (C) is the muscular layer responsible for contraction. Endocardium (A) is inner, epicardium (B) is outer, pericardium (D) is the sac.
Question 2 of 5
Which of the following blood cells phagocytizes antigen-antibody complexes and are effective against parasitic worms?
Correct Answer: A
Rationale: Eosinophils (A) combat parasites and immune complexes. Monocytes (B) phagocytize broadly, lymphocytes (C) are immune, basophils (D) promote inflammation.
Question 3 of 5
Which of the following precursor cells give rise to granular leukocytes?
Correct Answer: D
Rationale: Myeloblasts (D) produce granular leukocytes (neutrophils, eosinophils, basophils). Others form RBCs (A), platelets (B), or agranulocytes (C).
Question 4 of 5
Which of the following cell types has the main function of carrying oxygen?
Correct Answer: D
Rationale: Erythrocytes (D) carry oxygen via hemoglobin.
Question 5 of 5
Which of the following is an anticoagulant?
Correct Answer: D
Rationale: Heparin (D) inhibits clotting; others (A, B, C) promote it.