Muscle Anatomy
Name for a muscle cell
muscle fiber or myofiber
What is the functional unit of a muscle called?
sarcomere
A sustained contraction used to maintain posture.
tonic
-95 mV
Which metabolic pathway uses oxygen to create ATP
aerobic
A bundle of muscle fibers surrounded by perimysium
fascicle
What is the name of the theory describing muscle contraction?
slide filament theory
A motor nerve and all of the muscle fibers it innervates
motor unit
During depolarization which chemical gates are open?
Na+ gates
How many ATP is created per glucose through glycolysis?
2
perimysium
Name the band that shortens during a power stroke.
I Band
The presence of slight contraction (some muscle fibers always contracting) even in relaxed muscles
muscle tone
What chemical gates are open during repolarization?
K+ gates
Which type of pathway creates 32 ATP's?
Aerobic
epimysium
Name the Band which does NOT shorten.
A Band
Increasing strength of contraction by activating additional motor units.
recruitment
What phase in the contraction cycle is the depolarization/repolarization taking place?
Phase I
Name the waste products that are produced
water, CO2
Organelle containing myofilaments
myofibril
Define the exact location of a sarcomere.
the distance between to Z discs
Controls smoothness of contraction by increasing frequency
What triggers the NA/K gates to open at the NMJ?
Ach binding to the sarcolemma at the NMJ
Which pathway creates lactic acid?
Anaerbic Pathway