| Skeletal muscles are just one of the striated muscle tissues that basically comprise the voluntary movements of the human body. These muscles are attached to bones through tendons and always work in pairs just so as to bring about movement through contraction and relaxation. They consist of long, cylindrical fibers and therefore have a characteristic banded appearance due to the arrangement of myofilaments within the muscle fibers. Skeletal muscles have as one of their most important functions to make the body walk, run, lift, and dance. The other important function of skeletal muscles is the stabilization of posture during movement. Contraction force in skeletal muscles can be finely regulated to be either tremendous in strength or fine in detail. Definition of skeletal muscles states that they are under conscious control and can initiate action on basis of signals given out by the central nervous system. So, at every signal transmitted by the motor neuron, it calls up the muscle fibers to contract, and, hence, movement generation is the outcome. Such accuracy and complicated movements lead to the successful performance of daily activities and athletic performances. In addition to that, skeletal muscles enhance overall metabolic fitness. They are one of the heat-producing tissues for the body, and its contraction along with using glucose is the metabolism, thereby oxidizing fats. |
Skeletal Muscles Online Quiz
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- Test Name: Skeletal Muscles MCQ Quiz Practice
- Type: Quiz Test
- Total Questions: 40
- Total Marks: 40
- Time: 40 minutes
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Skeletal Muscles Flashcards
Skeletal muscles are attached to bones by ____________.
Tendons
Which protein is primarily responsible for muscle contraction in skeletal muscles?
Actin
Skeletal muscles are also known as __________ muscles.
Voluntary
Which type of muscle tissue is striated?
Skeletal muscle
Skeletal muscles are under the control of the __________ nervous system.
Somatic
The basic functional unit of a skeletal muscle fiber is the __________.
Sarcomere
What is the main function of skeletal muscles?
Movement
Which molecule stores and releases calcium ions in skeletal muscle contraction?
Sarcoplasmic reticulum
Skeletal muscles contract when __________ binds to receptors on muscle cells.
Acetylcholine
Which ion is necessary for the release of neurotransmitters at the neuromuscular junction?
Calcium
Skeletal muscles are composed of ___________ and connective tissue.
Muscle fibers
Skeletal muscles appear __________ under a microscope due to the arrangement of actin and myosin filaments.
Striated
The sliding filament theory explains __________.
Muscle contraction
Which enzyme breaks down acetylcholine to terminate muscle contraction?
Acetylcholinesterase
What is the term for the ability of skeletal muscles to return to their original length after contraction?
Elasticity
Skeletal muscles work in __________ with bones to produce movement.
Coordination
Which neurotransmitter is released from motor neurons to initiate muscle contraction?
Acetylcholine
Skeletal muscles primarily rely on __________ for energy during contraction.
ATP
What is the term for the site where a motor neuron meets a skeletal muscle fiber?
Neuromuscular junction
Which protein covers the binding sites on actin molecules in a relaxed muscle?
Tropomyosin
Skeletal muscles are involved in __________.
Voluntary movements
Which molecule directly supplies the energy for muscle contraction?
ATP
What is the term for the smallest functional unit of skeletal muscle contraction?
Sarcomere
Which type of muscle tissue is multinucleated?
Skeletal muscle
Skeletal muscles are attached to bones that act as __________.
Levers
Which neurotransmitter causes the release of calcium ions from the sarcoplasmic reticulum?
Acetylcholine
Skeletal muscles can generate force through __________ contractions.
Isotonic
The contraction of skeletal muscles is regulated by __________ ions.
Calcium
What is the term for the protein that forms thick filaments in skeletal muscle fibers?
Myosin
Which structure surrounds each individual muscle fiber?
Endomysium
Skeletal muscles are responsible for maintaining __________ posture.
Upright
What is the term for the increase in muscle fiber size due to resistance training?
Hypertrophy
Which energy molecule is used to regenerate ATP during muscle contraction?
Creatine phosphate
Skeletal muscles are made up of bundles of __________ called fascicles.
Muscle fibers
What is the term for the thick filament in skeletal muscle that interacts with actin during contraction?
Myosin
Which part of a skeletal muscle fiber stores calcium ions?
Sarcoplasmic reticulum
Skeletal muscles contribute to the regulation of __________.
Body temperature
What is the term for the region where actin and myosin filaments overlap during muscle contraction?
A band
Skeletal muscles are composed of bundles of __________ surrounded by connective tissue.
Muscle fibers
Which type of muscle contraction occurs when the muscle lengthens under tension?
Eccentric
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