Free CSCS exam: Scientific Foundations Practice Questions

Sample Practice Questions

Try these 10 sample questions from the CSCS exam: Scientific Foundations practice bank. Each includes the answer and explanation. Continue with the interactive practice above to review the full question set.

1. 1Which connective tissue layer encloses an individual skeletal muscle fiber?

   1. A. Epimysium
   2. B. Perimysium
   3. C. Endomysium
   4. D. Periosteum

   Answer: C

   Explanation: NCI states, "Within the fasciculus, each individual muscle cell, called a muscle fiber, is surrounded by connective tissue called the endomysium." Epimysium surrounds the muscle, perimysium surrounds a bundle, and periosteum covers bone.

   Reference: SEER Training: Structure of Skeletal Muscle — Structure of Skeletal Muscle, connective tissue coverings

2. 2Which set contains the three basic psychological needs emphasized by self-determination theory?

   1. A. Autonomy, competence, and relatedness
   2. B. Arousal, dominance, and competitiveness
   3. C. Reinforcement, punishment, and extinction
   4. D. Attention, imagery, and relaxation

   Answer: A

   Explanation: SDT identifies "basic psychological needs for autonomy, competence, and relatedness." The other sets mix performance techniques or behavioral-learning concepts with motivation theory.

   Reference: Self-Determination Theory: Theory Overview — Overview, basic psychological needs

3. 3After a glycogen-depleting endurance session, which dietary component most directly supplies the substrate for restoring muscle glycogen?

   1. A. Dietary carbohydrate
   2. B. Dietary cholesterol
   3. C. Dietary fiber alone
   4. D. Dietary sodium

   Answer: A

   Explanation: ODS identifies carbohydrates as necessary "to maintain blood glucose levels and replace muscle glycogen". Carbohydrate supplies glucose for glycogen replenishment; cholesterol, fiber alone, and sodium do not perform that nutritional role.

   Reference: Dietary Supplements for Exercise and Athletic Performance — Health Professional Fact Sheet — Introduction, athlete macronutrient needs

4. 4A dissection exposes a bundle of skeletal muscle fibers within a muscle. Which covering surrounds this fasciculus?

   1. A. Perimysium
   2. B. Endomysium
   3. C. Sarcolemma
   4. D. Epimysium

   Answer: A

   Explanation: NCI explains, "Each bundle of muscle fiber is called a fasciculus and is surrounded by a layer of connective tissue called the perimysium." Endomysium and sarcolemma relate to individual fibers; epimysium encloses the entire muscle.

   Reference: SEER Training: Structure of Skeletal Muscle — Structure of Skeletal Muscle, connective tissue coverings

5. 5An athlete practices a sport because learning and playing it are personally enjoyable, without seeking a reward. Which motivation predominates?

   1. A. External regulation
   2. B. Avoidance of punishment
   3. C. Intrinsic motivation
   4. D. Extrinsic motivation

   Answer: C

   Explanation: "Intrinsically motivated behaviors are performed because of the sense of personal satisfaction that they bring". Enjoyment of participation itself distinguishes this from externally contingent incentives.

   Reference: Psychology 2e: 10.1 Motivation — 10.1, Intrinsic and extrinsic motivation

6. 6Using the ODS-cited daily athlete protein range of 1.2–2.0 g/kg, what intake corresponds to the LOWER endpoint for an 80-kg athlete?

   1. A. 64 g/day
   2. B. 80 g/day
   3. C. 96 g/day
   4. D. 160 g/day

   Answer: C

   Explanation: ODS states that "athletes require a daily protein intake of 1.2 to 2.0 g/kg". The lower endpoint is 80 × 1.2 = 96 g/day. The 160-g value is the upper endpoint; 64 and 80 g use lower multipliers.

   Reference: Dietary Supplements for Exercise and Athletic Performance — Health Professional Fact Sheet — Protein — Implications for use

7. 7What is the name of the plasma membrane of a skeletal muscle fiber?

   1. A. Sarcoplasm
   2. B. Sarcomere
   3. C. Sarcoplasmic reticulum
   4. D. Sarcolemma

   Answer: D

   Explanation: The text states, "The plasma membrane of muscle fibers is called the sarcolemma". Sarcoplasm is cytoplasm, a sarcomere is a contractile unit, and the sarcoplasmic reticulum is an intracellular calcium store.

   Reference: Anatomy and Physiology 2e: 10.2 Skeletal Muscle — 10.2, Skeletal Muscle Fibers

8. 8An athlete attends optional practice primarily to earn a promised cash bonus. Which motivation is illustrated?

   1. A. Intrinsic enjoyment
   2. B. Extrinsic motivation
   3. C. Task absorption
   4. D. Curiosity-driven learning

   Answer: B

   Explanation: "extrinsically motivated behaviors are performed in order to receive something from others." The bonus is an external consequence rather than satisfaction in the activity itself.

   Reference: Psychology 2e: 10.1 Motivation — 10.1, Intrinsic and extrinsic motivation

9. 9When evaluating the quality of a postexercise protein source, what makes a protein complete?

   1. A. It supplies only the branched-chain amino acids.
   2. B. It supplies all essential amino acids.
   3. C. It supplies nonessential amino acids but lacks an essential one.
   4. D. It supplies a large protein dose regardless of amino acid pattern.

   Answer: B

   Explanation: ODS defines complete proteins as "those that contain all EAAs". Completeness depends on the essential-amino-acid profile, rather than BCAAs alone, nonessential amino acids, or total dose without regard to quality.

   Reference: Dietary Supplements for Exercise and Athletic Performance — Health Professional Fact Sheet — Protein, quality and quantity paragraph

10. 10Which pair of structures defines the boundaries of one skeletal muscle sarcomere?

    1. A. Two adjacent M-lines
    2. B. Two adjacent Z-lines
    3. C. Two neighboring T-tubules
    4. D. Two neighboring myofibrils

    Answer: B

    Explanation: Figure 10.5 identifies "The sarcomere, the region from one Z-line to the next Z-line, is the functional unit of a skeletal muscle fiber." M-lines lie at sarcomere centers; T-tubules and neighboring myofibrils do not define its ends.

    Reference: Anatomy and Physiology 2e: 10.2 Skeletal Muscle — 10.2, Figure 10.5