Muscular system diseases

Front

What is Muscular Dystrophy?

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Inherited muscle-destroying diseases characterized by degeneration of individual muscle fibers, usually voluntary.

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What is Myotonic Dystrophy?

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A condition where muscles contract but have decreasing power to relax, leading to weakness and wasting away; symptoms become more severe with each generation.

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What is a muscle spasm?

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A sudden, involuntary contraction of a single muscle within a large group.

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What causes rigor mortis?

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It occurs because there is no ATP to remove myosin cross bridges after death.

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What is Moebius disease?

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A condition where the 6th and 7th cranial nerves do not develop, resulting in palsy on one or both sides of the face.

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What is atrophy in the context of muscles?

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A decrease in muscle mass and strength due to disuse, disease, or malnutrition.

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What is Myasthenia Gravis?

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An autoimmune disorder that leads to weakness in the skeletal muscles, caused by a breakdown in communication between nerves and muscles.

Front

What is the role of ATP in muscle contraction?

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ATP is essential for muscle contraction and relaxation; it provides the energy needed for myosin to detach from actin.

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What are the symptoms of muscular dystrophy?

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Symptoms include progressive muscle weakness, difficulty walking, and muscle wasting.

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What is the difference between fasciculation and fibrillation?

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Fasciculation is a visible twitching of muscle fibers, while fibrillation is a rapid, uncoordinated contraction of muscle fibers.