Cross Bridge Cycle

__________ is attached to the Z line?

• myosin

• actin

• thick filament

• troponin

____________ attaches to actin to form the cross bridge.

• Troponin

• Tropomyosin

• Myosin

• Calcium

What does calcium attach in a muscle contraction?

• Myosin

• Tropomyosin

• Troponin

• Actin

What is released from the sarcoplasmic reticulum?

• Inorganic phosphate

• ADP

• Calcium

• ATP

What is the name of the neurotransmitter released at a neuromuscular junction?

• Calcium

• Acetylcholine

• Dopamine

• Troponin

A mitochondria's role in muscle contraction is the production of...

• Synthesis of ATP
• Metabolism of ATP
• Synthesis of Proteins
• Metabolism of Worn out Proteins

Tags

NGSS.HS-LS1-7

NGSS.HS-LS2-3

Which is more true to cause muscle contraction?

• Actin Pulls on the myosin
• Myosin Pulls on the Titin
• Myosin Pulls on Actin
• Actin Pulls on Titin

During full muscle contraction the A Band will...

• Disappear
• Get wider
• Stay the same
• Get narrower

During muscle contraction the 'Z' Lines will...

• Disappear
• Get Farther apart
• Get Closer Together
• Appear Thicker

Which of the following statements correctly explains the sliding filament model?

• Actin head attaches to a binding site on a myosin filament, forming a cross bridge.

• Myosin head attaches to a binding site on an actin filament, forming a neuromuscular junction.

• Actin head attaches to a binding site on a myosin filament, forming a neuromuscular junction.

• Myosin head attaches to a binding site on an actin filament, forming a cross bridge.