This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
In malignant hypehermia the increased heat production is due to : 
Select and explain. 
A. Increased muscle metabolism by excess of calcium ions, B. Thermic effect of food, C. Increased sympathetic discharge, D. Mitochondrial thermogenesis
A: Increased muscle metabolism by excess of calcium ions
Answer: A: Increased muscle metabolism by excess of calcium ions 
Explanation: . Increased muscle metabolism by excess of calcium ions