ATI RN
Cardiovascular System Questions and Answers Questions
Question 1 of 5
Valve through which the right ventricle pumps blood
Correct Answer: B
Rationale: The right ventricle pumps blood through the pulmonary semilunar valve (B) into the pulmonary artery. Tricuspid (A) is inflow, aortic (C) and mitral (D) are left-sided.
Question 2 of 5
Which of the following plasma proteins plays a role in blood clotting?
Correct Answer: C
Rationale: Fibrinogen (C) is key in clotting, forming fibrin. Albumin (A) and globulins (B) have other roles; prostaglandins (D) are signaling molecules.
Question 3 of 5
The intrinsic and extrinsic pathways of blood clotting are identical after formation of
Correct Answer: B
Rationale: Prothrombinase (B) formation unites both pathways, converting prothrombin to thrombin. Thromboplastin (A) is extrinsic, factor XII (C) is intrinsic, fibrin (D) is later.
Question 4 of 5
A condition in which inadequate intake of vitamin B12 or folic acid causes production of large abnormal red blood cells is called
Correct Answer: C
Rationale: Megaloblastic anemia (C) results from B12/folate deficiency, producing large, defective RBCs.
Question 5 of 5
Which of the following is not a leukocyte?
Correct Answer: B
Rationale: Reticulocytes (B) are immature RBCs, not leukocytes (WBCs).