Muscular System

What is the muscular system made up of?

• Muscles

• Bones

• Nerves

• Skin

Muscles are bundles of muscle fibers held together by ______.

• Connective tissue

• nerve fibers

• blood vessels

• fat cells

Ability to respond to a stimulus?

• Contractibility

• Excitability

• Extensibility

• Elasticity

What is the ability of muscles to become short and thick called?

• Contractibility.

• Relaxation.

• Elongation.

• Expansion.

Ability to be stretched?

• Contractibility

• Extensibility

• Elasticity

• Excitability

Ability to return to original shape?

• Excitability

• Contractibility

• Elasticity

• Extensibility

Voluntary muscles are:

• muscles that can be controlled consciously

• muscles that cannot be controlled consciously

• muscles found in the heart

• muscles that are always relaxed

Give examples of involuntary muscles.

• Skeletal muscles

• Cardiac muscles

• Smooth muscles

• Both Cardiac and Smooth muscles

Involuntary Muscles are:

• muscles that cannot be controlled consciously

• muscles that can be controlled consciously

  
  

• muscles found in the heart

• muscles that are always relaxed