Locomotion and Movement Question 46
46. Select the correct statement with respect to disorders of muscles in humans
[NEET Kar. 2013]
(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
Show Answer
Answer : b
Hints & Solutions
(b) 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. Myasthenia gravis is a chronic (long-lasting) disease that usually worsens slowly over time. Although symptoms may fluctuate in severity over the years, the disease rarely goes away on its own. The patients should avoid dairy foods, except for yogurt which can sooth digestive problems. Good choices include mild foods like bananas, white rice, eggs and chicken. Diarrhoea can lower potassium levels. Foods rich in potassium include orange juice, bananas, potatoes, avocados and apricots.
