Sliding filament theory

Calcium is stored in the ___.

• sarcoplasm

• sarcolemma

• sarcoplasmic reticulum

• transverse tubules

A ___extends from one Z disc to another Z disc.

• Sarcolemma

• Neuromuscular junction

• Sarcomere

• Motor end plate

___gets shorter during contraction.

• actin

• myosin

• troponin-tropomyosin

• none of these

___provides energy for muscle contraction and relaxation.

• cAMP

• ADP

• ATP

• M line

Tags

NGSS.HS-LS1-7

___slides inward during muscle contraction.

• actin

• myosin

Calcium:

• causes ATP binding to actin

• increases the action potential along the sarcolemma

• binds to proteins on myosin

• triggers the binding of myosin to actin

The neurotransmitter stored in the axon terminal identified as #3 is the neurotransmitter responsible for muscle contraction.

• Calcium Ion (Ca²⁺)

• Protein Channel

• Acetylcholine

• Synaptic Cleft

During full muscle contraction, which region disappear?

• I band

• M line

• H zone

• A band

What binds to the Myosin Head to cause it to detach from the Actin?

• ATP

• ADP

• CNS

• ETC

What causes the muscle to stop contracting?

• Lack of effort

• Myosin-Heads fail to attach

• Calcium Ions are pumped away

• Muscle fibre tears