Motor End Plate
Includes neuron, gap, and muscle
Neuromuscular Junction
Broad, white sheet of connective tissue
Aponeuroses
Muscle with straight fibers that extends from the ribs to the pubis and compresses the abdomen
What is rectus abdominus?
Stores calcium
Sarcoplasmic reticulum
Enough sodium enters a muscle to exceed the threshold
depolarization
Neurotransmitter responsible for action potential
ACh
Tissue wrapped around epimysium separating muscle groups
Fascia
antagonists
myosin heads bind to this
actin or thin filaments
Potassium leaks out causing the charge to dip lower than polarization
hyperpolarization
The term used when the leg is moved out to the side away from the body
What is abduction?
Bundles of muscle fibers
Fascicles
synergists of sternocleidomastoid
scalenes
calcium binds to change the shape of this molecule to open binding sites
Tropomyosin
Origin of biceps curls
humerus
one unit of muscle
sarcomere
Point of attachment that moves the muscle during contraction
What is insertion?
This molecule travels thru the T-tubules to open binding sites
calcium
The 3 main types of muscle
What are cardiac, visceral/smooth, skeletal?
The muscle on the front of the lower leg that flexes and inverts the foot.
What is tibialis anterior?
two proteins of muscle
actin and myosin
Biceps femoris, Semitendinosus, Semimembranosus
3-hamstrings
In a muscle twitch, sodium gates are closed but potassium gates are open during the phase of muscle relaxation
repolarization
Three functions of the skeletal muscles
1. provide voluntary movement 2. produce heat and energy for body 3. help maintain posture 4. protect internal organs