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Muscle Stack

Ability to Shorten Contractility
Respond to Stimulus Excitability
To be strectched Extensibility
Recoil to original Resting length Elasticity
Surrounds Skeletal Muscle by a connective tissue seath Epimysium
outside the Epimysium Fascia
Muscle Fasciculi surrounded by loose connective tissue Perimysium
Each fiber surrounded by a connective tissue seath Endomysium
2 myofibrils Actin, Myosin
Thin Myofilament Actin
Thick Myofilament Myosin
Formed highly ordered units Sacromeres
Light Band Z bands
Dark bands A bands
Where are the myosin filaments anchored. M line
Charge difference across the membrane Resting Membrane potential
Brief reversal back of the charge Action Potential
Nerve cells that carry action potentials to the skeletal muscle fibers Motor Nuerons
Each branch that connects to the muscle cells form what? Nueromuscular Junction or Synapse
single motor neuron and all its skeletal fibers it innervates Motor Unit
in the center of the sacromere is located The H-Band
The H band is made of Myosin
Enlarged Nerve Terminal Presynaptic Terminal
Space between the presynaptic terminal and the muscle cell Synaptic Cleft
The space between the presynaptic terminal and the muscle fiber Post-synaptic Terminal
Each presynaptic terminal contains synaptic vesicles
Secretes the nuerotransmitter Aceytlcholine
Enzymes aceytlcholinesterase
Occurs as actin and myosin myofilaments slide past one another causing the sacromeres to shorten Muscle Contraction
occurs during contraction Sliding filament mechanism
Contraction of an entire muscle in response to stimulus that causes the action potential in one or more fibers muscle twitch
Muscle fiber wont respond to stimulus until it reaches what? Threshold
Phenomenon All or none response
time between application of a stimulus to a motor neuron lag phase
time of contraction contraction phase
time during which the muscle relaxes relaxation phase
remain contracted without shortening tetany
increase in number of motor units being used recruitment
energy needed for muscle contraction ATP
produced in the Mitochondria ATP
shortlived and unstable ATP
What ATP becomes when stablized ADP
When ATP is used more than what is produced Muscle Fatigue
amount of tension increases in muscles Isometric
length of muscle changes Isotonic
Stationary end of the muscle Head
Contract and fatigue quickly Fast Twitch
Contract and fatigue slowly slow twitch
end of the muscle undergoing the most movement insertion
between origin and insertion belly
Created by: jpcurnutte12