#1
Which of the following is not a function of the muscular system?
Digesting food
ExplanationMuscular system primarily does not digest food.
#2
What is the primary function of skeletal muscles?
To produce voluntary movements
ExplanationSkeletal muscles primarily produce voluntary movements.
#3
Which vitamin is essential for proper muscle function?
Vitamin D
ExplanationVitamin D is essential for proper muscle function.
#4
What is the term for the outermost layer of connective tissue surrounding a muscle?
Epimysium
ExplanationEpimysium is the outermost layer of connective tissue surrounding a muscle.
#5
Which type of muscle is striated and under voluntary control?
Skeletal muscle
ExplanationSkeletal muscle is striated and under voluntary control.
#6
What is the name of the connective tissue that surrounds individual muscle fibers?
Endomysium
ExplanationEndomysium surrounds individual muscle fibers.
#7
What is the neurotransmitter released at the neuromuscular junction?
Acetylcholine
ExplanationAcetylcholine is released at the neuromuscular junction.
#8
Which of the following is a characteristic of fast-twitch muscle fibers?
Rapid contraction speed
ExplanationFast-twitch muscle fibers have rapid contraction speed.
#9
Which muscle is responsible for the majority of the force during inspiration (breathing in)?
Diaphragm
ExplanationDiaphragm is responsible for the majority of the force during inspiration.
#10
What is the function of myoglobin in muscle cells?
To store oxygen
ExplanationMyoglobin in muscle cells stores oxygen.
#11
What is the name of the enzyme that breaks down acetylcholine at the neuromuscular junction?
Cholinesterase
ExplanationCholinesterase breaks down acetylcholine at the neuromuscular junction.
#12
What is the term for the smallest functional unit of a skeletal muscle?
Sarcomere
ExplanationSarcomere is the smallest functional unit of a skeletal muscle.
#13
What is the primary energy source for muscle contractions during short bursts of intense activity?
Creatine phosphate
ExplanationCreatine phosphate is the primary energy source for short bursts of intense activity.
#14
Which structure stores calcium ions in muscle cells?
Sarcoplasmic reticulum
ExplanationSarcoplasmic reticulum stores calcium ions in muscle cells.