Muscles & Articulations

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

sarcomeres are defined by ________ at each end

• A lines

• H lines

• Q lines

• Z lines

Which of the following is synonymous with "Muscle Cell?"

• Myofilament

• Myofibril

• Myofiber

• Myofibrillator

"A single motor neuron, it's associated motor end plates, and all the fibers it innervates" is the definition of what?

• Motor Control

• Motor Unit

• Motor Pattern

• Motor Fiber

What is the key neurotransmitter that allows the action potential to transfer to the sacrolemma?

• Potassium

• Dopamine

• Acetylcholine

• Adrenalyn

What structure carries the action potential deep into the muscle tissue?

• Sarcoplasmic Reticulum

• Transverse Tubules

• Motor End Plate

• Terminal Cisternae