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Physiology General 71b7910b

There is a mutation of a gene coding for the ryanodine receptors in malignant hyperthermia. Which of the following statements best explains the increased heat production in malignant hyperthermia?

A
Increased muscle metabolism by excess of calcium ions
B
Thermic effect of blood
C
Increased sympathetic discharge
D
Mitochondrial thermogenesis
High-Yield Explanation
Ryanodine receptors in sarcoplasmic reticulum act as calcium channels. The mutation of Ryanodine receptors causes it to release Ca++ into sarcoplasm uncontrollably resulting in high metabolism by the muscles. This causes malignant hyperthermia.

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