ATI RN
Cardiovascular System Anatomy Questions and Answers Questions
Question 1 of 5
Which wave in an electrocardiogram represents repolarization of the ventricles?
Correct Answer: B
Rationale: The T wave (B) shows ventricular repolarization. P wave (D) is atrial depolarization, QRS (R, S) is ventricular depolarization.
Question 2 of 5
Another name for the right AV valve
Correct Answer: B
Rationale: The right AV valve is the tricuspid valve (B). Mitral (A) is left AV, aortic (C) and pulmonary (D) are semilunar.
Question 3 of 5
Which of the following is NOT a major function of the blood?
Correct Answer: D
Rationale: Blood transports oxygen (A), regulates pH (B), and protects against disease (C), but does not produce oxygen (D); that occurs in the lungs.
Question 4 of 5
Which of the following blood cells release granules that intensify the inflammatory response and promote hypersensitivity (allergic) reactions?
Correct Answer: D
Rationale: Basophils (D) release histamine and heparin, enhancing inflammation and allergies. Eosinophils (A) target parasites, monocytes (B) phagocytize, lymphocytes (C) are immune.
Question 5 of 5
Which of the following formed elements found in the blood are derived from reticulocytes?
Correct Answer: B
Rationale: Erythrocytes (B) mature from reticulocytes after losing nuclei. Others derive from different lineages.