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Questions and Answers
Muscle cells are of ______ origin and differentiate by a gradual process of cell lengthening with abundant synthesis of the myofibrillar proteins actin and myosin.
Muscle cells are of ______ origin and differentiate by a gradual process of cell lengthening with abundant synthesis of the myofibrillar proteins actin and myosin.
mesodermal
The ______ of muscle cells contains the sarcoplasm, sarcoplasmic reticulum, and sarcolemma.
The ______ of muscle cells contains the sarcoplasm, sarcoplasmic reticulum, and sarcolemma.
organelles
Skeletal muscle is also known as ______ muscle.
Skeletal muscle is also known as ______ muscle.
striated
The development of skeletal muscle is a process that occurs during ______.
The development of skeletal muscle is a process that occurs during ______.
Muscle tissue can be classified into three main types: skeletal, cardiac, and ______ muscle.
Muscle tissue can be classified into three main types: skeletal, cardiac, and ______ muscle.
The muscle fibers of skeletal muscle are ______ cells with diameters of 10-100 μm.
The muscle fibers of skeletal muscle are ______ cells with diameters of 10-100 μm.
Mesenchymal ______ fuse, forming myotubes with many nuclei during embryonic muscle development.
Mesenchymal ______ fuse, forming myotubes with many nuclei during embryonic muscle development.
The ______ is a delicate layer of reticular fibers tissue surrounding the external lamina of individual muscle fibers.
The ______ is a delicate layer of reticular fibers tissue surrounding the external lamina of individual muscle fibers.
The ______ is a thin connective tissue layer that immediately surrounds each bundle of muscle fibers termed a fascicle.
The ______ is a thin connective tissue layer that immediately surrounds each bundle of muscle fibers termed a fascicle.
Satellite cells proliferate and produce new ______ fibers following muscle injury.
Satellite cells proliferate and produce new ______ fibers following muscle injury.
I bands are bisected by a dark transverse line, the ______ disc.
I bands are bisected by a dark transverse line, the ______ disc.
Myotubes then further differentiate to form ______ muscle fibers.
Myotubes then further differentiate to form ______ muscle fibers.
ACh binds to ACh receptors in the motor end plate of the ______ junction.
ACh binds to ACh receptors in the motor end plate of the ______ junction.
Calcium ions bind to ______.
Calcium ions bind to ______.
Myosin heads of ______ filaments attach to exposed active sites.
Myosin heads of ______ filaments attach to exposed active sites.
Muscles with mainly type I ______ are often postural muscles.
Muscles with mainly type I ______ are often postural muscles.
Mitochondria are abundant in ______ fibers.
Mitochondria are abundant in ______ fibers.
The process of moving tropomyosin to expose active sites is done by ______.
The process of moving tropomyosin to expose active sites is done by ______.
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