General
involuntary muscle types
cardiac and smooth
Another name for the membrane and cytoplasm of a muscle cell
sarcolemma
What travels down the motor neuron to the axon terminal?
action potential
What is another name for the thick and thin filament ?
Myosin (Thick) and Actin (Thin)
smallest muscle
stapedius
Functions of skeletal muscle besides movement and support
heat production (due to breakdown of ATP)
Connective tissues wrapped each myofibril
endomysium
The neurotransmitter that is stored within these in the axon terminal until calcium binds to it.
ACh and synaptic vesicles
Calcium ions bind to this protein on actin.
troponin
hardest working skeletal muscle
masseter
the fascicle pattern for orbicularis oculi
circular
group of muscle fibers that create different patterns
fascicles
ions that come into the motor end plate once ACh binds
Na+
What causes the sarcomere to contract?
The sliding of actin filaments over myosin filaments after cross-bridges form
largest muscle
gluteus maximum
3 methods to name a muscle
location, size, direction of fibers, shape, action, number of origins, attachment locations
parts of the sarcomere that change when a muscle contracts
Z-disc gets closer
I-band gets shorter
H-zone gets shorter
The 3 parts of the triad
contraction type that doesn't cause movement
isometric
longest muscle
sartorius
What is the difference between extensibility and elasticity ?
Extensibility is the muscle ability to stretch and lengthen, while Elasticity is the ability to recoil and return to its original shape.
storage and release site of calcium ions
sarcoplasmic reticulum
What enzyme stops contraction in the NMJ ?
Acetylcholinesterase
What is the role of calcium within the muscle cell?
The calcium ions binds to troponin, causes to tropomyosin to shift, and causes the cycle to begin
teres minor, subscapularis, supraspinatus, infraspinatus