ATI LPN
100 Questions on the Cardiovascular System PDF Questions
Question 1 of 5
Effects of electrolyte changes:
Correct Answer: D
Rationale: Magnesium helps counteract digitalis toxicity by stabilizing cardiac membranes and reducing arrhythmogenic effects.
Question 2 of 5
Identify the thickest layer of the heart wall.
Correct Answer: C
Rationale: The myocardium is the thickest layer of the heart wall, consisting of cardiac muscle responsible for pumping.
Question 3 of 5
Explain the reason there is a delay in processing the electrical signal from the AV node to the AV bundle.
Correct Answer: A
Rationale: The delay allows atrial contraction to finish, ensuring blood is fully transferred to the ventricles.
Question 4 of 5
The layer of blood vessels consisting of an endothelial layer with a basement membrane is the tunica:
Correct Answer: C
Rationale: The tunica intima, or interna, is the innermost layer of blood vessels and consists of an endothelial lining and a basement membrane.
Question 5 of 5
Which of the following would cause blood pressure to decrease?
Correct Answer: D
Rationale: Atrial natriuretic factor (ANF) promotes vasodilation and sodium excretion, reducing blood volume and thus lowering blood pressure. The other options increase blood pressure.