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Questions and Answers
Muscle Tissue is generated by interaction of
Muscle Tissue is generated by interaction of
Actin and Myosin
contractile role in addition to being able to secrete collagen
contractile role in addition to being able to secrete collagen
Myofibroblasts
what are the 3 single cell contractile units
what are the 3 single cell contractile units
Myoepithelial cells Pericytes Myofibroblasts
cytoplasm of muscle cells
cytoplasm of muscle cells
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3 Multicellular contractile units
3 Multicellular contractile units
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component of a certain secretory glands
component of a certain secretory glands
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smooth muscle like cells
smooth muscle like cells
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surrounding cell membrane or plasmalemma
surrounding cell membrane or plasmalemma
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fusiform, lack striation, slow and involuntary contractions
fusiform, lack striation, slow and involuntary contractions
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long, multinucleated, with cross striations, quick, forceful, voluntary
long, multinucleated, with cross striations, quick, forceful, voluntary
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smooth endoplasmic reticulum
smooth endoplasmic reticulum
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surrounds all 3 types of muscles; contractile forces from internal contractile proteins to external lamina via link protein.
surrounds all 3 types of muscles; contractile forces from internal contractile proteins to external lamina via link protein.
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intercalated discs, involuntary, vigorous, and rhythmic
intercalated discs, involuntary, vigorous, and rhythmic
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elongated muscle cells
elongated muscle cells
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process of sliding interaction of myosin filaments along actin filaments
process of sliding interaction of myosin filaments along actin filaments
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Functions of Muscular Tissue
Functions of Muscular Tissue
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consists of elongated muscle cells called muscle fibers or myocytes
consists of elongated muscle cells called muscle fibers or myocytes
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Usually attached to bones by tendons
Usually attached to bones by tendons
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long cylindrical fiber
long cylindrical fiber
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Structures of Skeletal Muscle Fiber
Structures of Skeletal Muscle Fiber
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long finger like invaginations of the sarcolemma that penetrate into thesarcoplasm
long finger like invaginations of the sarcolemma that penetrate into thesarcoplasm
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found just beneath the sarcolemma
found just beneath the sarcolemma
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how many nuclei are found in each skeletal muscle fiber
how many nuclei are found in each skeletal muscle fiber
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red colored protein found only in muscle; binds oxygen molecules that diffuse into muscle fibers
red colored protein found only in muscle; binds oxygen molecules that diffuse into muscle fibers
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large molecule composed of many glucose molecules; can be used for ATP Synthesis
large molecule composed of many glucose molecules; can be used for ATP Synthesis
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lie in rows throughout the muscle fiber
lie in rows throughout the muscle fiber
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contractile organelles of skeletal muscle; arranged in parallel bundles
contractile organelles of skeletal muscle; arranged in parallel bundles
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fluid filled system of membranous sacs that encircles each myofibril
fluid filled system of membranous sacs that encircles each myofibril
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basic functional contractile unit of myofibril
basic functional contractile unit of myofibril
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narrow region in center of each A band
narrow region in center of each A band
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narrow, plate shaped regions of dense materials
narrow, plate shaped regions of dense materials
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region in center of H zone that contains proteins that hold filaments together at center of sarcomere
region in center of H zone that contains proteins that hold filaments together at center of sarcomere
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consists of long series of sarcomeres
consists of long series of sarcomeres
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dark, middle part of sarcomere
dark, middle part of sarcomere
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lighter, less dense area of sarcomere
lighter, less dense area of sarcomere
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3 layers of Skeletal Muscle
3 layers of Skeletal Muscle
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surrounds and separates individual muscle fibers from one another; consists mostly of reticular fibers
surrounds and separates individual muscle fibers from one another; consists mostly of reticular fibers
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outer layer, encircling the entire muscle; consists of dense irregular connective tissue
outer layer, encircling the entire muscle; consists of dense irregular connective tissue
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surrounds groups of 10 to 100 or more muscle fibers, separating the bundles called fasicles; consists of dense irregular collagenous connective tissue
surrounds groups of 10 to 100 or more muscle fibers, separating the bundles called fasicles; consists of dense irregular collagenous connective tissue
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3 kinds of muscle proteins
3 kinds of muscle proteins
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help switch the contraction process on and off
help switch the contraction process on and off
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generate force during contraction
generate force during contraction
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main component of thin filament; functions as a motor protein
main component of thin filament; functions as a motor protein
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component of thin filament
component of thin filament
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makes up thick filament; a molecule consists of a tail and two heads
makes up thick filament; a molecule consists of a tail and two heads
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keep thick and thin filaments of myofibrils in proper alignment
keep thick and thin filaments of myofibrils in proper alignment
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connects Z disc to M line of sarcomere
connects Z disc to M line of sarcomere
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regulatory protein that is a component of thin filament
regulatory protein that is a component of thin filament
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forms M line of sarcomere; binds to titin molecules and connects adjacent filaments to one another
forms M line of sarcomere; binds to titin molecules and connects adjacent filaments to one another
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links thin filaments of sarcomere to integral membrane proteins
links thin filaments of sarcomere to integral membrane proteins
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wraps around entire length of each thin filament; helps anchor thin filaments and regulates length of thin filaments during development
wraps around entire length of each thin filament; helps anchor thin filaments and regulates length of thin filaments during development
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structural proteins of Z discs that attaches to actin molecules of thin filament
structural proteins of Z discs that attaches to actin molecules of thin filament
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3 types of skeletal muscle fibers
3 types of skeletal muscle fibers
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largest and contain large amounts of myoglobin
largest and contain large amounts of myoglobin
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fibers appear dark red because they contain large amounts of myglobin
fibers appear dark red because they contain large amounts of myglobin
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have low myoglobin content; contain large amounts of glycogen and generate ATP
have low myoglobin content; contain large amounts of glycogen and generate ATP
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located in the heart and large vessels attached to the heart
located in the heart and large vessels attached to the heart
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Branched cylindrical fiber with one centrally located nucleus
Branched cylindrical fiber with one centrally located nucleus
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regulatory proteins
regulatory proteins
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length of cardiac muscle tissue (long)
length of cardiac muscle tissue (long)
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diameter of cardiac muscle tissue (large)
diameter of cardiac muscle tissue (large)
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found in walls of hollow viscera, airways, blood vessels etc…
found in walls of hollow viscera, airways, blood vessels etc…
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shape of fibers
shape of fibers
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develop from mesodermal cells
develop from mesodermal cells
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length of smooth muscle fiber (Intermediate)
length of smooth muscle fiber (Intermediate)
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Diameter of smooth muscular fiber (small)
Diameter of smooth muscular fiber (small)
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it can occur in skeletal muscle because of a population of reserve muscle satellite cells
it can occur in skeletal muscle because of a population of reserve muscle satellite cells
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rapid in smooth muscle because the cells/fibers are small and relatively less differentiated
rapid in smooth muscle because the cells/fibers are small and relatively less differentiated
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Cardiac muscle lacks?
Cardiac muscle lacks?
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filled with interstitial fluid
filled with interstitial fluid
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