ACSM ACSM Certifications 040-444 Questions & Answers

• Question 321:

  Which of the following is NOT a muscle type?

  A. Skeletal.

  B. Smooth.

  C. Cardiac.

  D. Generic.

  Correct Answer: D

• Question 322:

  When a motor unit is stimulated by a single nerve impulse, it responds by contracting one time and then relaxing. This is called a

  A. Twitch.

  B. Summation.

  C. Tetanus.

  D. Summary.

  Correct Answer: A

• Question 323:

  The motor neuron and all the muscle fibers it innervates are called a

  A. Motor junction.

  B. Motor unit.

  C. Motor end plate.

  D. N one of the above.

  Correct Answer: B

• Question 324:

  The three principal mechanisms for increasing venous return during dynamic exercise are

  A. A decrease in SV, HR, and compliance of the vascular system.

  B. Venoconstriction, pumping action of muscle, and the pumping action of the respiratory system.

  C. An increase in vascular resistance, increase in HR, and decrease in blood pressure.

  D. None of the above.

  Correct Answer: B

• Question 325:

  In a rested, well-fed athlete, most of the carbohydrate used as a substrate during exercise comes from

  A. Muscle glycogen stores.

  B. Blood glucose.

  C. Liver glycogen stores.

  D. Glycogen stored in fat cells.

  Correct Answer: A

• Question 326:

  Fast-twitch muscle fibers have which of the following characteristics compared with slow- twitch muscle fibers?

  A. Easily fatigued and well-developed aerobic system.

  B. High force production and well-developed blood supply.

  C. HighPCr stores and high ATPase stores.

  D. None of the above.

  Correct Answer: C

• Question 327:

  In general, the higher the intensity of the activity, the greater the contribution of

  A. Aerobic energy production.

  B. Anaerobic energy production.

  C. The Krebs cycle to the production of ATP.

  D. The electron-transport chain to the production of ATP.

  Correct Answer: B

• Question 328:

  The energy to perform long-term exercise (> or = 15 min) comes primarily from

  A. Aerobic metabolism.

  B. A combination of aerobic and anaerobic metabolism, with anaerobic metabolism producing the bulk of the ATP.

  C. Anaerobic metabolism.

  D. None of the above.

  Correct Answer: A

• Question 329:

  The simplest and most rapid method to produce ATP during exercise is through

  A. Glycolysis.

  B. The ATP-PCr system.

  C. Aerobic metabolism.

  D. Glycogenolysis.

  Correct Answer: B

• Question 330:

  During exercise of increasing intensity, the SV of normal adults

  A. Continues to increase throughout the duration of exercise up to Vo2max.

  B. Remains relatively stable duringsubmaximal exercise of greater than approximately 50% of Vo2max.

  C. Will continue to increase and then level off just before the achievement of Vo2max.

  D. None of the above.

  Correct Answer: B