muscle bundle = group of muscle fibers (muscle cells) that function together and are bound together...

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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 rime mover = muscle hat provides the primary ovement at a joint. In this xample: Biceps brachii ynergist = muscle that ssists the prime mover. n this case the brachialis ntagonist = muscle that opposes he prime mover. In this example: riceps brachii.

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Page 1: Muscle Bundle = group of muscle fibers (muscle cells) that function together and are bound together by fascia (connective tissue). Examples: biceps brachii,

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.

Page 2: Muscle Bundle = group of muscle fibers (muscle cells) that function together and are bound together by fascia (connective tissue). Examples: biceps brachii,

Bone

Tendon

Fascia

Fascicle

Muscle Fiber

Sarcolemma

SarcoplasmicReticulum

TransverseTubule

SarcomereZ-line

Page 3: Muscle Bundle = group of muscle fibers (muscle cells) that function together and are bound together by fascia (connective tissue). Examples: biceps brachii,

Page 4: Muscle Bundle = group of muscle fibers (muscle cells) that function together and are bound together by fascia (connective tissue). Examples: biceps brachii,

Sliding Filament Hypothesis

Z-lineActinMyosinZ-line

Myosin HeadsFully Stretched

Partially Contracted

Fully Contracted

Sarcomere Shortening

Page 5: Muscle Bundle = group of muscle fibers (muscle cells) that function together and are bound together by fascia (connective tissue). Examples: biceps brachii,

Myosin Head in the relaxed conformation

Tropomyosin coveringBinding sites

ATP

CaCaCa

Page 6: Muscle Bundle = group of muscle fibers (muscle cells) that function together and are bound together by fascia (connective tissue). Examples: biceps brachii,

Motor neuron Axon

Neuromuscular junction

Vesicle containingNeurotransmitter

(acetylcholine)

Transverse tubuleCa2+ active Transport pump

Ca2+Ca2+

Page 7: Muscle Bundle = group of muscle fibers (muscle cells) that function together and are bound together by fascia (connective tissue). Examples: biceps brachii,

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

Page 8: Muscle Bundle = group of muscle fibers (muscle cells) that function together and are bound together by fascia (connective tissue). Examples: biceps brachii,

Neuromuscular Junction

Motor neuronaxon

NeuromuscularJunction

Vesicles containingNeurotransmitter(acetylcholine)

Sarcolemma(muscle cell membrane)

Page 9: Muscle Bundle = group of muscle fibers (muscle cells) that function together and are bound together by fascia (connective tissue). Examples: biceps brachii,

Neuromuscular Junction

Page 10: Muscle Bundle = group of muscle fibers (muscle cells) that function together and are bound together by fascia (connective tissue). Examples: biceps brachii,

Page 11: Muscle Bundle = group of muscle fibers (muscle cells) that function together and are bound together by fascia (connective tissue). Examples: biceps brachii,

Page 12: Muscle Bundle = group of muscle fibers (muscle cells) that function together and are bound together by fascia (connective tissue). Examples: biceps brachii,

Page 13: Muscle Bundle = group of muscle fibers (muscle cells) that function together and are bound together by fascia (connective tissue). Examples: biceps brachii,

Page 14: Muscle Bundle = group of muscle fibers (muscle cells) that function together and are bound together by fascia (connective tissue). Examples: biceps brachii,

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Arm and Shoulder Muscles - Lone Star College System · Arm Muscles brachioradialis brachialis triceps brachii biceps brachii L a t e r a l M e d i a l Pronator teres . Upper Arm &

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