Muscle

The connective tissue coverings of a skeletal muscle, listed from superficial to deep, are

• Endomysium, perimysium & epimysium

• endomysium, epimysium & perimysium

• epimysium, endomysium & perimysium

• epimysium, perimysium & endomysium

Answer explanation

In a neuromuscular junction, action potentials cause Ca2+ channels in the presynaptic terminal to open.

• True

• False

The ___________ contains vesicles filled with acetylcholine.

• axon terminal

• motor end plate

• neuromuscular junction

• transverse tubule

The detachment of the myosin cross-bridges is directly triggered by

• the repolarization of T tubules

• the attachment of ATP to myosin heads

• the hydrolysis of ATP

• calcium ions

During muscle relaxation, calcium ions are transported into the sarcoplasmic reticulum.

• True

• False