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Psu Bio 161 Exam 4 Questions And Answers With Verified Solutions Already Passed!!!
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Psu Bio 161 Exam 4 Questions And Answers With Verified Solutions Already Passed!!!
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Psu Bio 161 Exam 4 Questions AndAnswers With Verified Solutions Already
Passed!!!
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
muscle shape: pennate - ANSWER✔✔ fascicles attach at an angle to central
tendon
sarcolemma - ANSWER✔✔ muscle cell membrane
t-tubules - ANSWER✔✔ penetrate the interior of the cell
sarcoplasm - ANSWER✔✔ intracellular fluid of muscle cell
sarcoplasmic reticulum - ANSWER✔✔ ER of muscle cell, has terminal cistern and
regulates calcium
thick filament - ANSWER✔✔ myosin
thin filament - ANSWER✔✔ actin, troponin, tropomyosin
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