Muscle System

Actin myofilaments

• are attached to the Z disk

• are found primarily in the H zone

• are thicker thatn myosin myofilaments

• all of the above

skeletal muscles

• require energy in order to contract

• require energy in order to relax

• relax when calcium ions are transported into sarcoplasmic reticulum

• all of the above

Muscles that oppose one another are

• synergist

• hateful

• prime movers

• antagonists

Which body system work together to allow the body to move?

• nervous / skeletal
• muscular / skeletal
• nervous / circulatory
• muscular / circulatory

Injury to a muscle, which involves tearing of muscle fibers and bleeding within the muscle belly:

• sprain.

• strain.

• tendonitis.

• tetanus.

Cory stretches every night after running. What is his desired outcome?

• Atrophy

• Contractibility

• Extensibility

• Hypertrophy

When Joe flexes his bicep, what characteristic of muscles describes what is happening to his bicep?

• Contractibility

• Elasticity

• Excitability

• Extensibility

This type of muscle tissue is found only in the heart

• Skeletal
• Cardiac
• Smooth

This type of muscle tissue is found in the walls of hollow organs such as the stomach 

• Skeletal
• Cardiac
• Smooth

This type of muscle tissue is attached to bones wand helps control voluntary movement

• Skeletal
• Cardiac
• Smooth