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Low ionized calcium level in the extra c...

Low ionized calcium level in the extra cellular fluid increases the permeability of neuromal membranes to sodium ion, causing a progressive depolarisation, which increases the possibility of action potential. This condition causes :-

A

Gout

B

Myasthenia gravis

C

Tetany in muscles

D

Tetanus in muscles

Text Solution

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The correct Answer is:
To solve the question regarding the effects of low ionized calcium levels in the extracellular fluid, we can follow these steps: ### Step-by-Step Solution: 1. **Understanding the Condition**: - The question states that low ionized calcium levels in the extracellular fluid lead to increased permeability of neuronal membranes to sodium ions. This condition is known as hypocalcemia. 2. **Effect on Neuronal Membranes**: - When calcium levels are low, the neuronal membranes become more permeable to sodium ions. This means that sodium ions can enter the neurons more easily. 3. **Progressive Depolarization**: - The influx of sodium ions causes a progressive depolarization of the neuronal membrane. Depolarization is a change in the membrane potential that makes it more positive. 4. **Increased Action Potential**: - As the depolarization continues, it increases the likelihood of reaching the threshold for action potential generation. An action potential is an electrical signal that travels along the neuron. 5. **Resulting Condition**: - The increased action potential can lead to involuntary muscle contractions and spasms. This condition is known as tetany, characterized by muscle cramps and spasms due to excessive excitability of the nerves and muscles. 6. **Conclusion**: - Therefore, the correct answer to the question is that low ionized calcium levels in the extracellular fluid cause tetany. ### Final Answer: The condition caused by low ionized calcium levels in the extracellular fluid is **tetany**. ---
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