Muscle Test review

What is number 3 pointing to?

• muscle fiber

• perimysium

• fascicle

• endomysium

Tags

NGSS.HS-LS1-2

A sarcomere is

• A protein filament or fiber
• The basic contractile unit of muscle contraction
• An organelle
• An organ

The part of the sarcomere that A (green) refers to is the?

• Z Line
• M Line
• H Line
• A Line

What state is the sarcomere in #1

• Relaxed
• Contracting
• Fully Contracted
• None of the above

What state is the sarcomere in #2

• Relaxed
• Contracting
• Fully Contracted
• None of the above

Only thick filaments present

• Sarcomere
• H zone
• M line 
• Z disc

Thin filaments in a myofibril are

• Sarcomeres
• Sarcoplasm
• Actin
• Myosin

Thick filaments are in a myofibril are

• ATPase
• Sarcoplasmic reticulum
• Actin
• Myosin

Actin or mysoin containing structure.

• Tendon
• myofilament
• myofibril
• Fiber

What is necessary for the myosin to release the actin?

• ATP

• Calcium

• ADP

• Sodium