Muscle System Flashcards
1
Q
Microscopic protein filaments that make up muscle cells
A
Myofibrils
2
Q
A motor neuron and all of the muscle fibers it innervates
A
Motor unit
3
Q
Long, slender cells that make up muscles
A
Muscle fiber
4
Q
Involuntary muscle tissue found only in the heart
A
Cardiac muscle
5
Q
Cellular organelle in muscle fiber corresponding to the Endoplasmic reticulum
A
Sarcoplasmic reticulum
