BIO 161: EXAM 4 QUESTIONS AND
ANSWERS A+ GRADED
excitability
ability to receive and respond to stimuli
conductivity
ability to propagate electrical signals over membrane
contractility
ability to shorten and generate force
extensibility
ability to be stretched without damaging tissue
elasticity
ability to return back to original shape after being stretched
skeletal muscle
muscle that attaches to bones via tendons, voluntary movement, striated, multinucleate
cardiac muscle
pumps blood throughout body and lines cavities of the heart, involuntary movement,
striated, mononucleate
smooth muscle
involuntary muscle found inside many internal organs of the body, non-striated,
mononucleate
striations
alternate dark and light bands found on skeletal and cardiac muscle, orderly
arrangement of actin and myosin filaments in microfibrils
fascicle
a small bundle of nerve or muscle fibers
muscle fiber
a long, cylindrical cell that is a fundamental unit of muscle tissue, formed by a group of
myofibrils
myofibril
organelle found in muscle cells that is made up of protein filaments and is responsible
for muscle contraction (organized into sarcomeres), major component of a muscle cell
epimysium
layer of dense irregular connective tissue that surrounds and protects skeletal muscle
perimysium
layer of connective tissue that surrounds bundles of muscles fibers, or fascicles, within a
skeletal muscle
endomysium
thin layer of connective tissue that surrounds each individual muscle fiber, or muscle
cells
indirect muscle attachment
ANSWERS A+ GRADED
excitability
ability to receive and respond to stimuli
conductivity
ability to propagate electrical signals over membrane
contractility
ability to shorten and generate force
extensibility
ability to be stretched without damaging tissue
elasticity
ability to return back to original shape after being stretched
skeletal muscle
muscle that attaches to bones via tendons, voluntary movement, striated, multinucleate
cardiac muscle
pumps blood throughout body and lines cavities of the heart, involuntary movement,
striated, mononucleate
smooth muscle
involuntary muscle found inside many internal organs of the body, non-striated,
mononucleate
striations
alternate dark and light bands found on skeletal and cardiac muscle, orderly
arrangement of actin and myosin filaments in microfibrils
fascicle
a small bundle of nerve or muscle fibers
muscle fiber
a long, cylindrical cell that is a fundamental unit of muscle tissue, formed by a group of
myofibrils
myofibril
organelle found in muscle cells that is made up of protein filaments and is responsible
for muscle contraction (organized into sarcomeres), major component of a muscle cell
epimysium
layer of dense irregular connective tissue that surrounds and protects skeletal muscle
perimysium
layer of connective tissue that surrounds bundles of muscles fibers, or fascicles, within a
skeletal muscle
endomysium
thin layer of connective tissue that surrounds each individual muscle fiber, or muscle
cells
indirect muscle attachment
