Musculoskeletal Physiology

Which muscle fiber type has the greatest resistance to fatigue?

• Type IIX muscle fibers

• Type I muscle fibers
• Type IIA muscle fibers

• Type III muscle fibers

True or False? Ligaments attach muscles to bones while tendons attach bones to bones within a joint.

• TRUE

• FALSE

True or False? Concerns have been raised over weightlifting performed by children due to the potential risk of damage to epiphyseal plates, but there is no clear evidence supporting this theory.

• FALSE

• TRUE

True or False? Based on the size principle, type IIA fibers are generally recruited first during an exercise due to their metabolic versatility.

• FALSE

• TRUE

Which of the following is not a type of muscle tissue found in the body?

• Rigid muscle

• Cardiac muscle

• Smooth muscle

• Skeletal muscle

Which of the following is released from the sarcoplasmic reticulum to facilitate a muscle fiber contraction?

• Magnesium

• Calcium

• Iron

• Sodium

Which of the following contraction types occur during the acceleration phase of a given lift and causes joint angle and muscle shortening?

• Eccentric

• Isokinetic

• Isometric

• Concentric

Which of the following helps to prevent osteoporosis?

• Weight-bearing activities

• Adequate calcium intake

• Adequate vitamin D intake

• All of the above

Which of the following is the antagonist muscle during a seated leg extension?

• Quadriceps

• Calves

• Hip flexors

• Hamstrings

Which muscle would have the highest percentage of slow-twitch fibers?

• Biceps

• Quadriceps

• Pectoralis

• Soleus