Week 20 Muscle Anatomy

Which of the following puts the structures of the muscle in order from largest to smallest?

• Whole muscle, muscle fiber, actin & myosin, myofibril, muscle fasicle

• Whole muscle, muscle fasicle, muscle fiber, myofibril, actin & myosin

• Whole muscle, muscle fiber, muscle fasicle, myofibril, actin & myosin

• Whole muscle, muscle fasicle, muscle fiber, actin & myosin, myofibril

Tags

NGSS.HS-LS1-2

__________ is attached to the Z line?

• myosin

• actin

• thick filament

• troponin

What is the contractile unit formed from Z line to Z line?

• Sarcomere

• T Tubule

• Sarcoplasmic reticulum

• Fascicle

____________ attaches to actin to form the cross bridge.

• Troponin

• Tropomyosin

• Myosin

• Calcium

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

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

What causes the muscle to stop contracting?

• Lack of effort

• Myosin-Heads fail to attach

• Calcium Ions are pumped away

• Muscle fibre tears

What is necessary for the myosin to release the actin?

• ATP

• Calcium

• ADP

• Sodium