Upload
jonas-knight
View
221
Download
0
Tags:
Embed Size (px)
Citation preview
Muscle Bundle = group of muscle fibers (muscle cells) that function together and are bound together by fascia (connective tissue). Examples: biceps brachii,trapezius, pectoralis major.
Origin
Insertion
Belly
Prime mover = muscle that provides the primary movement at a joint. In thisExample: Biceps brachii
Synergist = muscle that Assists the prime mover.In this case the brachialis
Antagonist = muscle that opposes The prime mover. In this example:Triceps brachii.
Bone
Tendon
Fascia
Fascicle
Muscle Fiber
Sarcolemma
SarcoplasmicReticulum
TransverseTubule
SarcomereZ-line
Sliding Filament Hypothesis
Z-lineActinMyosinZ-line
Myosin HeadsFully Stretched
Partially Contracted
Fully Contracted
Sarcomere Shortening
Motor neuron Axon
Neuromuscular junction
Vesicle containingNeurotransmitter
(acetylcholine)
Transverse tubuleCa2+ active Transport pump
Ca2+Ca2+
Motor Unit = motor neuron and the muscleCells that it stimulates
Motor neuron Branches to Stimulate 4 cells Different neuron branches
to stimulate 8 different cells
Neuromuscular Junction
Motor neuronaxon
NeuromuscularJunction
Vesicles containingNeurotransmitter(acetylcholine)
Sarcolemma(muscle cell membrane)