Understanding the Muscular System

What is the primary function of the muscular system?

• To produce hormones

• To facilitate movement

• To digest food

• To circulate blood

Which term describes the movement of a limb toward the midline of the body?

• Abduction

• Adduction

• Flexion

• Extension

What is the opposite of flexion?

• Abduction

• Adduction

• Extension

• Rotation

What is the ability of a muscle to return to its original shape after being stretched or contracted?

• Contractibility

• Elasticity

• Excitability

• Flexibility

What is the term for the permanent tightening of muscles, tendons, skin, and nearby tissues that causes the joints to shorten and become very stiff?

• Contracture

• Spasm

• Cramp

• Strain

Which of the following describes the ability of a muscle to respond to a stimulus?

• Elasticity

• Contractibility

• Excitability

• Flexibility

What is the term for the slight tension that is present in muscles even when they are at rest, causing them to be "ready to act"?

• Muscle tone

• Muscle fatigue

• Muscle spasm

• Muscle cramp

Which term describes the movement of a limb away from the midline of the body?

• Adduction

• Abduction

• Flexion

• Extension

What is it called when describing the ability of a muscle to shorten and become thick, causing movement?

• Elasticity

• Contractibility

• Excitability

• Flexibility

Which of the following is NOT a characteristic of muscle tissue?

• Elasticity

• Contractibility

• Excitability

• Inflexibility