1
myofibrils are composed of bundles known as ______
2
thin layer that surrounds each muscle fiber
3
thick layer that groups muscle fibers into fascicles, i.e. the marbling in a steak
4
a ______ muscle contains sarcomeres that have formed many crossbridges
5
smallest contractile unit of the skeletal muscle
6
stored in muscles and provides energy
7
voluntary muscle; attached to skeleton by tendons or aponeurosis
8
also known as a muscle cell, composed of myofibrils
9
muscle under involuntary control by the ANS; found in the walls of the heart
10
a _____ muscle contains sarcomeres that DO NOT have many crossbridges
11
short, thick contractile filaments
12
involuntary muscle controlled by the ANS and hormonal stimulation; found in the walls of internal organs
13
long, thin contractile filaments
