Principles of Muscle Function Quiz

Challenge yourself with questions on muscle function, contraction, and physiology. Test your understanding now!

#1

Which molecule is directly responsible for providing energy to muscles during contraction?

Glucose
Adenosine triphosphate (ATP)
Glycogen
Lactic acid
#2

Which of the following muscle types is striated and under voluntary control?

Cardiac muscle
Smooth muscle
Skeletal muscle
Involuntary muscle
#3

Which structure connects muscle to bone, allowing for movement to occur at a joint?

Tendon
Ligament
Cartilage
Fascia
#4

Which protein serves as the main structural component of thin filaments in muscle fibers?

Myosin
Actin
Troponin
Tropomyosin
#5

Which term refers to the ability of a muscle to respond to a stimulus?

Contractility
Excitability
Elasticity
Extensibility
#6

What is the term used to describe the ability of a muscle to return to its original length after being stretched?

Elasticity
Contractility
Excitability
Extensibility
#7

Which neurotransmitter is released at the neuromuscular junction to stimulate muscle contraction?

Acetylcholine
Dopamine
Serotonin
Norepinephrine
#8

Which term describes the smallest functional unit of a muscle fiber?

Myofibril
Sarcomere
Myofilament
Endomysium
#9

What is the primary function of the sarcoplasmic reticulum in muscle cells?

Production of ATP
Storage and release of calcium ions
Generation of action potentials
Protein synthesis
#10

Which type of muscle contraction occurs when the force generated by the muscle is greater than the resistance, resulting in shortening of the muscle?

Isometric contraction
Concentric contraction
Eccentric contraction
Isotonic contraction
#11

During muscle contraction, which protein binds to calcium ions to expose active sites on actin filaments?

Myosin
Troponin
Tropomyosin
Calcitonin
#12

Which hormone stimulates muscle growth and protein synthesis in response to resistance training?

Insulin
Growth hormone
Cortisol
Thyroid hormone
#13

Which regulatory protein blocks the myosin-binding sites on actin in a relaxed muscle?

Myosin
Troponin
Tropomyosin
Calcitonin

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