Miscellaneous
on the outside of the epimysium
Fascia
If it has visible banding it is
striated
The Thick filaments of the sarcomere are called
Myosin Filaments
ability to receive and respond to a stimulus
Irritability
Single, brief contraction
Not a normal muscle function
Twitch
around a fascicle (bundle) of fibers
Perimysium
cord-like structure
Tendon
Bundles of myofilaments are called
Myofibrils
ability to shorten when an adequate stimulus is received
Contractability
Some relaxation occurs between contractions
The results are summed
Unfused
around single muscle fiber
Endomysium
What are two of the four primary functions of muscles
Produce movement
Maintain posture
Stabilize joints
Generate heat
specialized plasma membrane
Sarcolemma
What is characterized by these traits?
One neuron
Muscle cells stimulated by that neuron
Motor Unit
One contraction is immediately followed by another
The muscle does
not completely
return to a
resting state
Tetanus
If something is subject to conscious control it is called
Voluntary
What type of muscle cell is this?
Spindle-shaped cells
Has no striations
Single nucleus
Involuntary – no conscious control
Smooth
At rest, there is a __________ that lacks actin filaments
Bare Zone
association site of nerve and muscle
Neuromuscular Junction
No evidence of relaxation before the following contractions
The result is a sustained muscle contraction
Fused
Three basic muscle types are found in the body
Skeletal, Cardiac and Smooth
What are the three sites of muscle attachments?
Bones
Cartilages
Connective tissue coverings
specialized smooth endoplasmic reticulum
Sarcoplasmic Reticulun
gap between nerve and muscle
Synaptic Cleft
Initially, muscles used stored ATP for energy
Bonds of ATP are broken to release energy
Only _____**_______ seconds worth of ATP is stored by muscles
4-6 seconds