Plateau Phase

Only 4 questions need to be discussed. No words limit but hoping at least 4-6 sentences for each question (Not necessary

Answer the questions listed below .

Post your answers first, each question should be clearly answered.

1) Why is the plateau phase so critical to cardiac muscle function?

2) How does the delay of the impulse at the atrioventricular node contribute to cardiac function?

3) Why do the cardiac muscles cells demonstrate autorhythmicity?

4) Why does increasing EDV increase contractility?