First slide

Disorders of Muscular and Skeletal System

Question

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

Easy

A

Failure of neuromuscular transmission in myasthenia gravis can prevent normal swallowing.
B

Accumulation of urea and creatine in the joints causes their inflammation.
C

An overdose of vitamin D causes osteoporosis.
D

Rapid contractions of skeletal muscles cause muscle dystrophy.

Solution

Failure of neuromuscular transmission in myasthenia gravis can prevent normal swallowing because muscle contraction is required for swallowing.
Inflammation of joints in gout is due to the accumulation of uric acid (not urea).
Osteoporosis is due to hypersecretion of PTH.
Rapid spasm of skeletal muscle is called tetany.

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