The correct sequential path of a normal action potential in the heart is:

SA node ( AV node ( bundle of His ( bundle branches ( Purkinje fibers
SA node ( AV bundle ( AV node ( Purkinje fibers
SA node ( AV node ( bundle branches ( AV bundle ( Purkinje fibers
AV node ( SA node ( AV bundle ( bundle of His
none of the choices are correct


SA node ( AV node ( bundle of His ( bundle branches ( Purkinje fibers

Anatomy & Physiology

You might also like to view...

Activation of ______ receptors usually brings about _______

a. alpha-1, excitation b. alpha-2, inhibition c. beta-1, excitation d. beta-2, inhibition e. All of the above are correct choices.

Anatomy & Physiology

In the case of a genetic disorder, how can the genetic code be changed?

A. By a trauma B. By a mutagen C. By a carcinogen D. None of these answers are correct

Anatomy & Physiology

Glucagon increases blood glucose concentration and insulin decreases it. This is an example of ________.

A. the antagonistic effect B. the cascade effect C. the permissive effect D. hormone clearance E. the synergistic effect

Anatomy & Physiology

Aging of the brain begins

A) at age 30. B) before birth. C) at birth. D) after age 50.

Anatomy & Physiology