Tetany is caused by__________?
Correct answer: A. Hypocalcemia
- A. Hypocalcemia
- B. Hypercalcemia
- C. Clostridum tetani.
- D. Low O2 level
Explanation
Tetany is caused by hypocalcemia, or a reduced concentration of calcium ions in the blood, which increases nerve and muscle excitability and produces spasms. The likely distractor is Clostridium tetani, which causes infectious tetanus, a different condition from hypocalcemic tetany.
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About Muscle Contraction
Muscle contraction is explained by the sliding filament model, in which myosin heads pull actin filaments within sarcomeres using ATP. The topic covers calcium, troponin, tropomyosin, the neuromuscular junction and relaxation, with attention to how filament length stays almost constant while the sarcomere shortens.
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