The downward slope - Cardiac innervation

3 important questions on The downward slope - Cardiac innervation

Which divisions of the ANS stimulate the heart?

The parasympathetic (through the vagus nerves) and the sympathetic

What parts of the heart are innervated by the sympathetic nervous system?

All parts of the heart- including the ventricular muscles.

What affect does sympathetic innervation have on the myocyte?

1. increased force of contraction
2. increased heart rate
3. faster repolarisation of cell
4. increased SAN discharge

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