How it Works
Try Naxlex NCLEX-RN (Free-Trial)

Which cardiac conduction system component follows the SA node?

A.

AV node

B.

Bundle of His

C.

Purkinje fibers

D.

AV bundle

Answer and Explanation

The Correct Answer is A

A. AV node: The impulse travels from the SA node through atrial pathways to the AV node next—this is the normal sequence.
B. Bundle of His: Comes after the AV node, not immediately after the SA node.
C. Purkinje fibers: Terminal conduction fibers in the ventricles; far downstream from the SA node.
D. AV bundle: Another name for the Bundle of His, which still comes after the AV node.


Get 100+ Naxlex Exit Exams for $79 Try Naxlex NCLEX-RN (14 Day Free-Trial)

Naxlex Comprehensive Predictor Exams

Free Nursing Study Resources

Related Questions

Correct Answer is A

Explanation

A. Macrophages -Alveolar macrophages (dust cells) engulf debris, dust, and pathogens.
B. Surfactant -Surfactant reduces surface tension, preventing alveolar collapse, but does not remove particles.
C. Antibodies -Antibodies neutralize pathogens but do not actively remove inhaled particles.
D. Lymphocytes -Lymphocytes mediate immune responses but are not the main mechanism for clearing inhaled debris.

Correct Answer is ["A","C"]

Explanation

A. heart: Has atrioventricular (mitral/tricuspid) and semilunar (aortic/pulmonic) valves.
B. arteries: Systemic arteries generally lack valves (the aortic/pulmonic “valves” are cardiac valves at the heart outflow, not within the arterial tree).
C. veins: Especially in limbs; valves prevent backflow and aid venous return.
D. capillaries: Capillaries are single-layer vessels without valves.

Whether you are a student looking to ace your exams or a practicing nurse seeking to enhance your expertise , our nursing education contents will empower you with the confidence and competence to make a difference in the lives of patients and become a respected leader in the healthcare field.

Visit Naxlex, invest in your future and unlock endless possibilities with our unparalleled nursing education contents today

Register