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Histo Lab Exercises - Muscle
Histo Lab Exercises - Muscle
14
Anatomy
Professional
03/05/2009

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Term
3 major classes of muscle cells (myofibers)
Definition
skeletal, cardiac, smooth
Term
myofilaments composed of
Definition
thick & thin myofilaments
Term
thin myofilaments proteins
Definition
actin, troponin, tropomyosin (except smooth muscle)
Term
contractile proteins form thread-like structures
Definition
myofilaments (muscle threads)
Term
thick myofilamints are composed of what protein?
Definition
bundles of myosin molecules
Term
sliding or contracting
Definition
despite being contractile proteins; actin/myosin cause filaments to slide past each other
Term
myofibrils
Definition
small cylindrical structures (little muscle fibers)
Term
in order to function; skeletal muscle cell must have contat w...
Definition
somatic motor neuron
Term
axon branches which end in small cluster on a single muscle cell
Definition
myoneural junction or "motor end plate"
Term
motor unit
Definition
single motor neuron + all the muscle cells it innervates (supplies)
Term
"myelinated" axon
Definition
wrapped in myelin sheath-produced by schwann ell
Term
sole plate
Definition
indentation in sarcolemma which houses axon terminal
Term
junctional folds
Definition
ruffled look of sole plate thrown into small folds; increases surface area
Term
acetylchole
Definition
manufactured and packaged in sarcoplasm of axon terminals
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