32.2: The Muscular System Flashcards
1
Q
muscle fiber
A
long slender skeletal muscle cells
2
Q
myofibril
A
tightly packed filament bundles found within skeletal muscle fibers
3
Q
myosin
A
thick filament of protein found in skeletal muscle cells
4
Q
actin
A
thin filament of protein found in muscles
5
Q
sarcomere
A
unit of muscle contraction; composed of two z-lines and the filaments between them
6
Q
neuromuscular junction
A
the point of contract between a motor neuron and a skeletal muscle cell
7
Q
acetylcholine
A
a neurotransmitter that produces an impulse in a muscle cell
8
Q
tendon
A
tough connective tissue that connects skeletal muscles to bones
