#1
Which of the following is a voluntary muscle disorder?
Muscular dystrophy
Myasthenia gravis
Fibromyalgia
Spinal muscular atrophy
#2
Which muscle disorder is characterized by progressive weakening and wasting of skeletal muscles?
Muscular dystrophy
Myasthenia gravis
Multiple sclerosis
Amyotrophic lateral sclerosis
#3
Which type of muscle is primarily responsible for voluntary movement?
Smooth muscle
Cardiac muscle
Skeletal muscle
Visceral muscle
#4
Which of the following is NOT a type of muscular dystrophy?
Duchenne muscular dystrophy
Becker muscular dystrophy
Myotonic dystrophy
Myasthenia gravis
#5
Which neurotransmitter is primarily involved in muscle contraction?
Dopamine
Serotonin
Acetylcholine
Norepinephrine
#6
Which of the following statements about muscle fibers is true?
Type I fibers are primarily involved in anaerobic activities.
Type II fibers have a higher resistance to fatigue compared to Type I fibers.
Type I fibers are also known as fast-twitch fibers.
Type II fibers are more abundant in endurance athletes.
#7
Which of the following is NOT a function of muscles?
Producing heat
Supporting internal organs
Facilitating movement
Regulating blood sugar levels
#8
What is the main characteristic of myasthenia gravis?
Muscle stiffness
Muscle weakness that worsens with activity
Muscle pain
Muscle hypertrophy
#9
Which of the following is a characteristic symptom of fibromyalgia?
Muscle weakness
Joint inflammation
Chronic widespread pain
Loss of coordination
#10
What is a common treatment approach for muscular dystrophy?
Antibiotics
Physical therapy
Antiviral medications
Blood thinners
#11
Which of the following is a symptom commonly associated with myotonic dystrophy?
Muscle weakness
Excessive muscle stiffness
Uncontrolled muscle contractions
Sudden muscle spasms
#12
What is the primary cause of Duchenne muscular dystrophy?
Genetic mutation affecting dystrophin production
Autoimmune reaction against muscle cells
Degeneration of motor neurons
Viral infection targeting muscle tissue
#13
Which of the following is a neuromuscular disorder affecting motor neurons?
Muscular dystrophy
Myasthenia gravis
Spinal muscular atrophy
Fibromyalgia
#14
What role does the sarcoplasmic reticulum play in muscle contraction?
It stores and releases calcium ions
It synthesizes ATP
It provides structural support to the muscle fiber
It facilitates neurotransmission at the neuromuscular junction
#15
Which of the following is a characteristic of amyotrophic lateral sclerosis (ALS)?
Muscle stiffness
Sudden muscle weakness
Progressive loss of motor control
Muscle hypertrophy
#16
What is the main role of creatine phosphate in muscle metabolism?
To provide energy for muscle contraction
To transport oxygen to muscle cells
To remove lactic acid from muscle tissue
To facilitate neurotransmission at the neuromuscular junction
#17
Which of the following conditions is characterized by inflammation and weakness of the muscles, particularly in the shoulders and hips?
Polymyositis
Dermatomyositis
Inclusion body myositis
Muscular dystrophy
#18
What is the main characteristic of facioscapulohumeral muscular dystrophy (FSHD)?
Weakness in facial muscles
Loss of coordination
Muscle stiffness
Abnormal muscle enlargement