What is the bundle of his?

a. a collection of heart muscle components that specialize in preventing the backward flow of blood

b. a collection of valves used for electrical conduction that allow the blood vessels to contract

c. a collection of heart muscle components specializing in electrical conduction that allow the ventricles to contract

d. a collection of chambers specialized for electrical conduction that allow the ventricles to expand

c

Option C is the right answer

Explanation:

A group of heart muscles that specialize in conducting electric to transfer this impulses to the apex point of fascicular branches from the AV node, is known as HIS bundles. It is located in the "right and left branches" in the interventricular septum.

The filament fibres produced by the branches transports the impulse to the muscles of ventricular to make it contract. It takes a time period of 0.03-0.04 seconds for the impulses to flow to the ventricular.

the more fit you are, the faster the recovery. your heart rate drops most sharply in the first minute after you stop exercising; it should then fall about 20 beats a minute—a drop of less than 12 beats a minute is considered abnormal. this “recovery heart rate” is measured as part of an exercise stress test.