muscular system

What type of muscle is shown?*

• cardiac

• smooth

• skeletal

   

• strong

What is the minimal level of stimulation required to cause a muscle fiber to contract?

• twitch stimulus

• motor stimulus

   

• myofilament stimulus

• threshold stimulus

 

What are those muscles which oppose an opposite muscle action called?

• agonist (prime mover)

• antagonist

   

• synergist

• movement specialist

What is a muscle bruise caused by a minor trauma to the body?

• cramp

• strain

• myositis

• contusion

What are the contractile cells of muscle tissue that are grouped together & to create a single muscle strand?

• muscle fibers

   

• myofilaments

• synergists

• perimysium

 

Which answer best describes what happens in regards to a persons overall strength of contraction when lifting a small weight?

• muscles only partially contract

• every muscle contracts regardless of weight lifted

   

• a smaller number of motor units are recruited

• a larger number of motor units are recruited

What is a special type of skeletal muscle contraction used to maintain posture?

• isometric contraction

• isotonic contraction

   

• tonic contraction

• tetanic contraction

What is a loss of muscle power resulting in weakness due to prolonged use?

• fatigue

   

• oxygen debt

• paralysis

• atrophy

 

What is the wasting away of muscle tissue that results in the decrease in size of the a body part?

• atrophy

   

• hypertrophy

• hypotrophy

• subtrophy

What is meant by the phrase "ALL OR NONE RESPONSE" in relation to the muscle contraction?

• muscles will always contract if stimulated

   

• muscles will sometimes contract if stimulated

• muscles will contract completely if threshold stimulus is met

• muscles either contract when told to or not contract when they aren't