Trace the Wave of Depolarization Through the Heart $\rarr$ Atria $\rarr$ Ventricles $\rarr$

question 42

Multiple Choice

Trace the wave of depolarization through the heart.

• A)SA node \(\rarr\) atria\(\rarr\) ventricles \(\rarr\)AV node \(\rarr\) bundle of His \(\rarr\) Purkinje fibers
• B)AV node \(\rarr\) atria \(\rarr\) SA node \(\rarr\) ventricles\(\rarr\) Purkinje fibers \(\rarr\) bundle of His
• C)AV node \(\rarr\) atria \(\rarr\) SA node \(\rarr\) Purkinje fibers \(\rarr\) bundle of His \(\rarr\) ventricles
• D)SA node \(\rarr\) atria \(\rarr\) AV node \(\rarr\) bundle of His \(\rarr\) Purkinje fibers \(\rarr\) ventricles

---

Definitions:

Energetic Barriers

The energy obstacles that must be overcome for a chemical reaction to proceed, related to the activation energy of the reaction.

Postzygotic Barriers

Reproductive barriers that occur after fertilization, preventing successful development, survival, or reproduction of hybrid offspring.

Flicker Hybrid Zone

A hypothetical or unverified term in biology; potentially refers to a region where closely related species with marginal differences, akin to light flickers, meet and hybridize.

Stable Hybrid Zone

An area where two distinct species meet and interbreed, yet remain genetically distinct due to limited gene flow.