The short delay in impulse conduction at the _____________ allows time for the atria to contract before the ventricles begin contracting.

Conduction of impulses between the atria and the ventricles is channelled through the a. Annulus fibrosus b. AV node c. SA node d. Bundle of His

The atrioventricular node a. Is connected to specialized wide, fast conducting myocytes in the bundle of His and Purkinje fibres b. Delays impulses for about 200 ms, allowing time for atrial contraction to complete ventricular filling c. Is a band of fibrous connective tissue which separates the atria from the ventricles d. Conducts impulses rapidly allowing almost immediate activation of ventricular muscle

The AV nodal delay ensures that:Group of answer choicesVentricular diastole occurs before systole.The atria contract and push blood into the ventricles prior to ventricular systole.Atrial diastole occurs before ventricular systole.The ventricles contract prior to atrial systole.

The part of the cardiac conduction system that excites contraction of the interventricular septum is the ________________.

When the atria are contracting you would expect:Question 2Select one or more:a.The atrioventricular valves to be open.b.Pressure in the atria to be higher than the pressure in the ventricles.c.The semilunar valves to be open.d.Blood to be moving from ventricles to atria.e.The ventricles to be in diastole.