Introduction to the Muscular System

What is the term for wave-like muscle contractions? 

• myogenesis 
• peristalsis
• sarcoplasmic reticulum
• depolarization

A __________ muscle closes an opening. 

• tensor
• adductor
• depressor
• sphincter

Which muscle is triangular shaped? 

• Triceps
• Rhomboideus
• Quadriceps
• Deltoid

Isometric muscle action means: 

• contraction with no movement
• contraction with movement
• movement but no contraction 
• none of the above

Isotonic muscle action means: 

• contraction without movement
• contraction with movement
• no muscle contraction
• none of the above

Muscle tissue that makes up the intestines: 

• cardiac 
• smooth
• rough
• skeletal

Decreasing the angle at a joint

• extensor
• flexor
• adductor
• abductor

Increasing the angle at a joint: 

• adductor
• abductor
• extensor
• flexor

Muscle action which moves AWAY from the midline: 

• abductor
• adductor
• depressor
• extensor

Which of the following are the THICK myofilaments? 

• actin
• titin
• myoglobin
• myosin