Download Muscular System

Presentation By:
Chris Bryant
Jesse Curran
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All movements of
the human body
require muscles.
Whether you punch
a friend, or digest
food, you are using
your muscles.
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Muscle tone

Heart Beat

Distribution of heat

Propel body fluids/food
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Creatine phosphate
ADP +ATP
Glycolysis
Cell Respiration
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Anaerobic: without oxygen
Aerobic: with oxygen

Definition: A
muscle fiber
exposed to a
series of stimuli
of increasing
frequency reaches
a point when it is
unable to
completely relax
before the next
stimulus in the
series.

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Even when muscles appear to be at rest they
are sustaining some contraction giving them
Muscle Tone.
Recruitment: An increase in the number of
motor units being activated during intense
activity.

Origin: immovable end of a muscle

Insertion: the movable end
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Prime mover: main muscle moving

Synergists: stabilizer muscles
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Antagonist: opposing the prime mover

Example: triceps and biceps

Dushenne Muscular Dystrophy: protein
dystrophin is missing
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Helps attach cell to surrounding extracellular matrix.
Fatty and connective tissue replaces muscle.
Chariot-Marie-Tooth Disease: slowly
progressing weakness in muscles of the hand
and feet and decrease in tendon reflexes.

Extra gene impairs insulting sheath around nerve
cells so cannot correctly stimulate involved muscles.
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