Transcript skeletal muscle notes

STRUCTURES ASSOCIATED
WITH A SKELETAL MUSCLE
Introductory Questions
Where is skeletal muscle found in your body?
Attached to bone.
(Smooth muscle lines organs, and cardiac muscle is found
in the heart.)
What is the function of skeletal muscle?
Voluntary movement
Stability (posture)
Communication (facial expression, speech)
Control of body openings
Heat production- 85% of body heat is generated by
muscles providing the proper environment for enzymes
and therefore metabolism
Word Parts/Meanings
Fascia- band or bundle
Epi-upon
Peri- around
Endo- inner
Mys- muscle
Sarco-flesh
Lemma- husk
Structures of a skeletal muscle fiber
A Sarcomere
Twizzler analogy
Many packages of
Twizzlers = Fascicle
Find a Fascicle on
your diagram.
Twizzler analogy 2
1 package of
Twizzlers =
Muscle fiber
The packaging =
Sarcolemma
Twizzler analogy 3
1 bundle of twizzlers =
myofibril
Twizzler analogy 4
1 Twizzler strand =
Filament
Compare the Muscle Fiber to
Pull and Peel Twizzlers
How amazing is that?