Briefly describe parasympathetic innervation of the heart. ...

[jho37]

Briefly describe parasympathetic innervation of the heart.
 
  What will be an ideal response?

Question 2

Hypertrophy refers to a(n) _____.
 
  a. delay in impulse conduction through the SA node
  b. disturbance in impulse conduction through the AV junction
  c. increase in the diameter of a chamber of the heart caused by volume overload
  d. increase in the thickness of a heart chamber because of chronic pressure overload

[KKcool]

Answer to Question 1

Parasympathetic (inhibitory) nerve fibers supply the sinoatrial node, atrial muscle, and the atrioventricular junction of the heart by the vagus nerves.

Answer to Question 2

D
Enlargement of the atrial chambers, ventricular chambers, or both, may occur if there is a volume or pressure overload in the heart. Dilatation is an increase in the diameter of a chamber of the heart caused by volume overload. Dilatation may be acute or chronic. Hypertrophy is an increase in the thickness of a heart chamber because of chronic pressure overload. Hypertrophy is commonly accompanied by dilatation. Enlargement is a term that implies the presence of dilatation or hypertrophy or both.