#1
Which of the following is a voluntary muscle disorder?
Myasthenia gravis
ExplanationCharacterized by muscle weakness worsened by activity
#2
Which muscle disorder is characterized by progressive weakening and wasting of skeletal muscles?
Muscular dystrophy
ExplanationProgressive weakening and wasting of skeletal muscles
#3
Which type of muscle is primarily responsible for voluntary movement?
Skeletal muscle
ExplanationPrimarily responsible for voluntary movement
#4
Which of the following is NOT a type of muscular dystrophy?
Myasthenia gravis
ExplanationNot a type of muscular dystrophy
#5
Which neurotransmitter is primarily involved in muscle contraction?
Acetylcholine
ExplanationAcetylcholine primarily involved in muscle contraction
#6
Which of the following statements about muscle fibers is true?
Type II fibers have a higher resistance to fatigue compared to Type I fibers.
ExplanationType II fibers have higher resistance to fatigue compared to Type I fibers
#7
Which of the following is NOT a function of muscles?
Regulating blood sugar levels
ExplanationNot involved in regulating blood sugar levels
#8
What is the main characteristic of myasthenia gravis?
Muscle weakness that worsens with activity
ExplanationMuscle weakness worsens with activity
#9
Which of the following is a characteristic symptom of fibromyalgia?
Chronic widespread pain
ExplanationCharacterized by chronic widespread pain
#10
What is a common treatment approach for muscular dystrophy?
Physical therapy
ExplanationCommonly treated with physical therapy
#11
Which of the following is a symptom commonly associated with myotonic dystrophy?
Uncontrolled muscle contractions
ExplanationCommonly associated with uncontrolled muscle contractions
#12
What is the primary cause of Duchenne muscular dystrophy?
Genetic mutation affecting dystrophin production
ExplanationCaused by genetic mutation affecting dystrophin production
#13
Which of the following is a neuromuscular disorder affecting motor neurons?
Spinal muscular atrophy
ExplanationAffects motor neurons
#14
What role does the sarcoplasmic reticulum play in muscle contraction?
It stores and releases calcium ions
ExplanationStores and releases calcium ions for muscle contraction
#15
Which of the following is a characteristic of amyotrophic lateral sclerosis (ALS)?
Progressive loss of motor control
ExplanationCharacterized by progressive loss of motor control
#16
What is the main role of creatine phosphate in muscle metabolism?
To provide energy for muscle contraction
ExplanationProvides energy for muscle contraction
#17
Which of the following conditions is characterized by inflammation and weakness of the muscles, particularly in the shoulders and hips?
Dermatomyositis
ExplanationInflammation and weakness of muscles, especially in shoulders and hips
#18
What is the main characteristic of facioscapulohumeral muscular dystrophy (FSHD)?
Weakness in facial muscles
ExplanationCharacterized by weakness in facial muscles