Ascending and descending tracts can be found in which area(s) of the spinal cord?

Atrial natriuretic peptide increases aldosterone secretion.

A) adrenaline. B) erythropoietin. C) angiotensin. D) atrial natriuretic peptide. E) cortisol.

The cardiac pacemaker cells are located in which of the following?

A) Purkinje fibers B) SA node C) AV node D) bundle branches E) bundle of His

Which of the following is a characteristic of slow-twitch oxidative skeletal muscle fibers?

A) few mitochondria only B) long contraction duration and high capillary density C) high capillary density only D) long contraction duration only E) long contraction duration, few mitochondria, and high capillary density

What part of your tracing illustrates vagal escape?

A) the part where the force of contraction decreased B) the part where the heart stopped C) the part where the heart resumed beating D) the part where the heart rate slowed down