CSCS Exercise Science & Anatomy 2

Question 1

Which muscle fiber type is characterized by high oxidative capacity, slow contraction speed, and fatigue resistance?

Accepted Answer

Type I fibers

Answer

Type IIx fibers

Answer

Type IIa fibers

Answer

Type IIb fibers

Question 2

The sliding filament theory of muscle contraction states that shortening occurs when:

Accepted Answer

Myosin cross-bridges pull actin filaments toward the center of the sarcomere

Answer

Actin and myosin filaments shorten in length

Answer

Actin filaments slide over myosin filaments toward the M-line

Answer

Z-discs move apart to increase sarcomere length

Question 3

What is the primary role of the Golgi tendon organ (GTO)?

Accepted Answer

Detect changes in muscle tension and inhibit excessive force

Answer

Detect changes in muscle length

Answer

Monitor joint position and proprioception

Answer

Facilitate stretch reflexes during plyometric training

Question 4

During pressing movements like the bench press, which rotator cuff muscle is most at risk of impingement injury due to its passage under the acromion?

Accepted Answer

Supraspinatus

Answer

Subscapularis

Answer

Teres minor

Answer

Infraspinatus

Question 5

Which energy system predominantly fuels a 400-meter sprint lasting approximately 45-60 seconds?

Accepted Answer

Fast glycolysis (anaerobic glycolysis)

Answer

Phosphagen (ATP-PCr) system

Answer

Oxidative phosphorylation (aerobic system)

Answer

Beta-oxidation of fats

Question 6

What is the primary physiological basis for the rapid phase of EPOC (Excess Post-exercise Oxygen Consumption) in the first 2-3 minutes after intense exercise?

Accepted Answer

Re-synthesis of phosphocreatine and oxygen debt repayment in blood/muscle

Answer

Restoration of muscle glycogen stores

Answer

Rebuilding of damaged muscle proteins

Answer

Sustained elevation of growth hormone secretion