Mastering A&P chapter 10
endomysium
Muscle fibers are directly surrounded by which thin layer of connective tissue? tendon endomysium epimysium perimysium
aponeuroses
Muscles are attached to bones by tendons or __________. ligaments perimysium aponeuroses superficial fascia
a repeating functional unit of striated muscle
Sarcomere is best defined as __________. -thick and thin filaments -a storage organelle for calcium -actomyosin proteins -a repeating functional unit of striated muscle
pump blood
Skeletal muscle does each of these EXCEPT __________. produce movement maintain posture pump blood store nutrients
sarcolemma
The action potential in skeletal muscle fibers is first generated on the __________. sarcophagus sarcoplasmic reticulum sarcolemma sarcoplasm
endomysium
The capillaries that wrap around each muscle fiber are located within the __________. epimysium endomysium sarcolemma perimysium
elastic protein
Titin is a(n) __________. -tropomyosin-binding protein -elastic protein -thin filament protein -calcium-binding protein
calcium ion release
Triads in skeletal muscle fibers function in __________. calcium ion release calcium ion uptake neuromuscular transmission sarcomere shortening
their fiber branch
Which of these statements about skeletal muscles is FALSE? They support soft tissues. Their fibers branch. They store nutrient reserves. They pull on tendons
the region of the resting sarcomere that only contains thick filaments
Which region of the sarcomere gives rise to the structure (band or line) of the H band? -the region of the resting sarcomere that only contains thick filaments -the boundary between adjacent sarcomeres -the region of the sarcomere that contains only thin filaments -the point of connection for adjacent thick filaments
the region of the sarcomere that contains only thin filaments
Which region of the sarcomere gives rise to the structure (band or line) of the I band? -the point of connection for adjacent thick filaments -the boundary between adjacent sarcomeres -the region of the resting sarcomere that only contains thick filaments -the region of the sarcomere that contains only thin filaments
the point of connection for adjacent tails of the thick filaments
Which region of the sarcomere gives rise to the structure (band or line) of the M line -the region of the sarcomere that contains only thin filaments -the region of the resting sarcomere that only contains thick filaments -the boundary between adjacent sarcomeres -the point of connection for adjacent tails of the thick filaments
the boundary between adjacent sarcomeres
Which region of the sarcomere gives rise to the structure (band or line) of the Z line? -the boundary between adjacent sarcomeres -the region of the sarcomere that contains only thin filaments -the region of the resting sarcomere that only contains thick filaments -the point of connection for adjacent thick filaments
skeletal
Which type of muscle tissue has the greatest effect on the body's heat production? -cardiac -smooth -skeletal -All of these muscle types have about the same effect on the body's heat production.
part of coupling the action potential (electrical event) to contraction (mechanical event)
the function of the T-tubules or transverse tubules is -storage of calcium -making of energy (ATP), "power house" of the cell -houses the genetic material (DNA) of the cell -part of coupling the action potential (electrical event) to contraction (mechanical event)
storage of calcium
the function of the triad is -storage of calcium -making of energy (ATP), "power house" of the cell -part of coupling the action potential to contraction -houses the genetic material (DNA) of the cell
houses the genetic material (DNA) of the cell
what is the function of the neucli on skeletal muscle? -part of coupling the action potential to contraction -houses the genetic material (DNA) of the cell -storage of calcium -making of ATP, the "power house" of the cell
