PSU Bio 161 Exam 4 2026Exam WiTH CoRRECT aCTUaL
QUESTioNS aND CoRRECTLY WELL DEFiNED aNSWERS LaTEST
aLREaDY GRaDED a+
excitability - aNSWER-ability to respond to chemicals released from motor
neurons
conductivity - aNSWER-ability for electrical impulses to be transmitted across
membrane
contractility - aNSWER-ability to shorten and generate force
extensibility - aNSWER-ability to stretch without damaging tissue
elasticity - aNSWER-ability to stretch and return to original shape
skeletal muscle is - aNSWER-voluntary, striated, multinucleate, and found attached
to bone or fascia
cardiac muscle is - aNSWER-non-voluntary, striated, mononucleate, found on the
heart (auto-rhythmic)
smooth muscle is - aNSWER-non-voluntary, non-striated, mononucleate, found on
hollow organs
what is a muscle - aNSWER-a group of fascicles
, what is a fascicle - aNSWER-a group of muscle fibers
what are myofibrils - aNSWER-bundles of protein filaments
what are sarcomeres - aNSWER-functional units of muscular system
epimysium - aNSWER-covers entire muscle
perimysium - aNSWER-covers fascicles
endomysium - aNSWER-covers muscle fibers
direct muscle attachment - aNSWER-continuous with periosteum (looks like
muscle emerges from bone)
indirect muscle attachment - aNSWER-form tendons that merge with periosteum
muscle to fascia attachment - aNSWER-insert to a broad sheet of connective
tissue called aponeurosis (similar to a tendon)
muscle shape: circular - aNSWER-fascicles concentrically arranged around an
opening
muscle shape: convergent - aNSWER-fascicles form a broad area and converge on
a common attachment
muscle shape: parallel - aNSWER-fascicles parallel to long axis of muscle
QUESTioNS aND CoRRECTLY WELL DEFiNED aNSWERS LaTEST
aLREaDY GRaDED a+
excitability - aNSWER-ability to respond to chemicals released from motor
neurons
conductivity - aNSWER-ability for electrical impulses to be transmitted across
membrane
contractility - aNSWER-ability to shorten and generate force
extensibility - aNSWER-ability to stretch without damaging tissue
elasticity - aNSWER-ability to stretch and return to original shape
skeletal muscle is - aNSWER-voluntary, striated, multinucleate, and found attached
to bone or fascia
cardiac muscle is - aNSWER-non-voluntary, striated, mononucleate, found on the
heart (auto-rhythmic)
smooth muscle is - aNSWER-non-voluntary, non-striated, mononucleate, found on
hollow organs
what is a muscle - aNSWER-a group of fascicles
, what is a fascicle - aNSWER-a group of muscle fibers
what are myofibrils - aNSWER-bundles of protein filaments
what are sarcomeres - aNSWER-functional units of muscular system
epimysium - aNSWER-covers entire muscle
perimysium - aNSWER-covers fascicles
endomysium - aNSWER-covers muscle fibers
direct muscle attachment - aNSWER-continuous with periosteum (looks like
muscle emerges from bone)
indirect muscle attachment - aNSWER-form tendons that merge with periosteum
muscle to fascia attachment - aNSWER-insert to a broad sheet of connective
tissue called aponeurosis (similar to a tendon)
muscle shape: circular - aNSWER-fascicles concentrically arranged around an
opening
muscle shape: convergent - aNSWER-fascicles form a broad area and converge on
a common attachment
muscle shape: parallel - aNSWER-fascicles parallel to long axis of muscle
