A fascicle is aa. muscle,b. bundle of muscle fibers enclosed by a connective tissue sheath,c. bundle of myofibrils,d. group of myofilaments.

An entire skeletal muscle is surrounded by __________.

Which of the following statements is INCORRECT?

Where does 95% of the energy needed for contraction come from during moderate exercise?

The connective tissue covering that encloses the sarcolemma of an individual muscle fiber is called thea. epimysium,b. perimysium,c. endomysium,d. periosteum.

Thick and thin myofilaments have different compositions. For each descriptive phrase, indicate whether the filament is,a. thick orb. thin._____(1) contains actin_____ (2) contains ATPases_____(3) attaches to the Z disc_____(4) contains myosin_____(5) contains troponin_____(6) does not lie in the I band

The function of the T tubules in muscle contraction is toa. make and store glycogen,b. release Ca²⁺ into the cell interior and then pick it up again,c. transmit the action potential deep into the muscle cells,d. form proteins.

True or false: Most muscles contain a predominance of one skeletal muscle fiber type. Explain the reasoning behind your choice.