KROK 1 Stomatology 2016 – Question 175 · KROK (Dentistry)
During perfusion of an isolated heart of a mammal with a high ion content solution the cardiac arrest in diastole occurred. The cardiac arrest was caused by the following ions present excessively in the solution:
- A. Chlorine
- B. Sodium
- C. Calcium
- D. Potassium
- E. Magnesium
Hint
Think which ion, in excess, depolarizes the resting membrane and inactivates sodium channels, preventing excitation.
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