The Pop Quiz below contains 3 questions from the following knowledge area of the CSCS exam. Failure to correctly answer questions may suggest an area that needs further review.

Exercise Sciences

A. Apply Knowledge of Muscle Anatomy and Physiology

1. Muscle anatomy (muscle group names, specific, muscle names, muscle fiber/cell structures, etc)
2. Muscular dynamics involved during movement patterns (e.g., sliding filament theory, type of muscle action)

When answering the questions, please choose the “Best” answer.

1. What type of muscular contraction occurs in the pectoralis major during the slow, controlled, downward phase of a bench press?

 Isometric

 Myocentric

 Eccentric

 Concentric

Eccentric muscle actions occur when the tension developed in the cross-bridges is less than the external resistance and the muscle lengthens.

2. What is released from the sarcoplasmic reticulum into the myofibril, causing tension development in a muscle?

 Calcium ions that bind to tropomyosin

 Calcium ions that bind to troponin

 Sodium ions that bind to troponin

 Sodium ions that bind to tropomyosin

Calcium is released from the sarcoplasmic reticulum which then binds to troponin, a protien that has a high affinity for calcium

3. Each muscle fiber is surrounded by a connective tissue called?

 Endomysium

 Fasiciculi

 Epimysium

 Perimysium

Each muscle fiber is surrounded by a connective tissue called endomysium

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