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Skeletal Muscle Function and Disorders Quiz

#1

Which of the following is not a function of skeletal muscles?

Storage of minerals
Explanation

Skeletal muscles do not store minerals; they primarily enable movement.

#2

What is the primary function of skeletal muscles?

Generating force to produce movement
Explanation

Skeletal muscles generate force for movement.

#3

Which structure connects skeletal muscles to bones?

Tendon
Explanation

Tendons connect muscles to bones.

#4

Which of the following is a voluntary action controlled by skeletal muscles?

Walking
Explanation

Walking is a voluntary action controlled by skeletal muscles.

#5

Which type of muscle fibers are predominantly used for endurance activities?

Type I fibers (slow-twitch)
Explanation

Type I fibers are suited for endurance activities due to their fatigue-resistant nature.

#6

Which mineral is essential for muscle contraction and relaxation?

Calcium
Explanation

Calcium is crucial for both muscle contraction and relaxation.

#7

Which neurotransmitter is responsible for signaling the contraction of skeletal muscles?

Acetylcholine
Explanation

Acetylcholine signals muscle contraction.

#8

What is the medical term for a sudden, involuntary contraction of a skeletal muscle?

Spasm
Explanation

A spasm is a sudden, involuntary muscle contraction.

#9

What is the term for the smallest functional unit of a skeletal muscle?

Sarcomere
Explanation

Sarcomere is the basic unit of muscle contraction.

#10

Which of the following is a symptom of a muscle strain?

Muscle weakness
Explanation

Muscle weakness can result from a muscle strain.

#11

What is the term for the decrease in muscle size due to disuse or injury?

Atrophy
Explanation

Atrophy refers to the decrease in muscle size due to various factors.

#12

Which disorder is characterized by chronic widespread musculoskeletal pain?

Fibromyalgia
Explanation

Fibromyalgia presents as chronic musculoskeletal pain.

#13

Which disorder is characterized by progressive weakness and degeneration of skeletal muscles?

Muscular dystrophy
Explanation

Muscular dystrophy leads to muscle weakness and degeneration.

#14

What is the primary energy source for skeletal muscle contraction during short bursts of intense activity?

Creatine phosphate
Explanation

Creatine phosphate is the primary energy source for short bursts of activity.

#15

Which enzyme breaks down acetylcholine to terminate muscle contraction?

Acetylcholinesterase
Explanation

Acetylcholinesterase terminates muscle contraction by breaking down acetylcholine.

#16

Which disorder is characterized by the autoimmune destruction of acetylcholine receptors at the neuromuscular junction?

Myasthenia gravis
Explanation

Myasthenia gravis involves autoimmune destruction of acetylcholine receptors.

#17

Which disorder is characterized by the abnormal accumulation of fibrous tissue in skeletal muscles, leading to contractures and weakness?

Dermatomyositis
Explanation

Dermatomyositis involves fibrous tissue accumulation in muscles, causing weakness.

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