Sarcomere

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

• Z Line
• M Line
• H Line
• A Line

The functional unit of the muscle cell is the: 

• Sarcomere
• Osteon
• Myofilament
• Muscle fiber

What zone/band of the sarcomere is represented by yellow.

• I Zone/Band
• A Zone/Band
• H Zone/Band
• M Zone/Band

The part of the sarcomere that D (Red) refers to is the?

• Actin
• Myosin
• Troponin
• Tropomyosin

The part of the sarcomere that C (Blue) refers to is the?

• Actin
• Myosin
• Troponin
• Tropomyosin

Thick filaments are in a myofibril are

• ATPase
• Sarcoplasmic reticulum
• Actin
• Myosin

What state is the sarcomere in #1

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

Only thick filaments present

• Sarcomere
• H zone
• M line 
• Z disc

Actin or mysoin containing structure.

• Tendon
• myofilament
• myofibril
• Fiber

What happens to the Z lines during a sarcomere contraction?

• It disappears
• gets closer together
• It gets bigger
• None of these