Which of the following correctly lists the sequence of structures that a cardiac action potential follows in order to excite normal contraction of the heart?

Correct Answer: D

Rationale: The correct pathway is: SA node→ AV node→ Bundle of His→ Purkinje fibers, ensuring sequential depolarization and contraction of the heart chambers.

Correct Answer: D

Rationale: The pericardium is the sac enclosing the heart, protecting and lubricating it.

Correct Answer: B

Rationale: The renal artery supplies the kidney; the suprarenal artery supplies the adrenal glands.

Correct Answer: D

Rationale: The normal conduction pathway is SA node, AV node, bundle of His, and Purkinje fibers.

Correct Answer: A

Rationale: The radial artery, located on the thumb side of the wrist, is the most commonly used site for checking the pulse in the wrist due to its accessibility and prominence.