Ch. 20 Pre-Lab

The thick myfibril filament of a sarcomere is composed of a protein a. myosin b. actin c. titin d. sarcolemma

a. myosin

The plasma membrane of a muscle fiber (cell) is called the sarcolemma. a. true b. false

a. true

A synergistic muscle contraction assists the prime mover. a. true b. false

b. false

The role of a particular muscle is always the same. a. true b. false

b. false

The muscle is primarily responsible for a movement is the a. synergist b. prime mover (agonist) c. antagonist d. origin

b. prime mover

The outermost layer of connective tissue of a muscle is the a. fascicle b. endomysium c. epmysium d. perimysium

c. epimysium

The functional contractile unit of a muscle fiber (cell) is a a. sarcoplasm b. sarclemma c. sarcomere d. sarcoplasmic reticulum

c. sarcomere

The neuron and the collection of muscle fibers it innervates is called the a. neural impulse b. muscle fiber c. motor neuron d. motor unit

d. motor unit