Select the correct statement with respect to disorders of muscles in humans

Options

(a) Rapid contractions of skeletal muscles causes muscle dystrophy
(b) Failure of neuromuscular transmission in myasthenia gravis can prevent normal swallowing
(c) Accumulation of urea and creatine in the joints cause their inflammation
(d) An overdose of vitamin – D causes osteoporosis

Correct Answer:

Failure of neuromuscular transmission in myasthenia gravis can prevent normal swallowing

Explanation:

Myasthenia gravis is a chronic autoimmune muscular disease. It causes breakdown of neuromuscular junction due to which the brain loses control over muscles. The symptoms may include drooping eyelids, difficulty in swallowing muscle fatigue, difficult breathing and inability to control facial expressions.