Surgery In tetany the increased membrane excitability is caused by: A Decreased release of inhibitory neurotransmitter from nerve terminals B Depolarization of the nerve and muscle membranes C Spontaneous release of calcium from the sarcoplasmic reticulum D Activation of sodium channels at more negative membrane potentials 💡 Explanation In tetany the increased membrane excitability is caused by: ✓ Correct Answer: B. Depolarization of the nerve and muscle membranes