KROK 1 Stomatology 2015 – Question 193 · KROK (Dentistry)
An isolated heart of a mammal has had diastolic arrest in the process of perfusion with an ion-rich solution. Solution had excess of the following ions:
- A. Chlorine
- B. Calcium
- C. Magnesium
- D. Potassium
- E. Sodium
Hint
Consider which ion in excess depolarises cardiomyocyte membranes, inactivating sodium channels and stopping the heart in relaxation.
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