ACSM ch 2 HFS exam

  1. the term used to describe the body's ability to acquire, convert, store, and utilize energy
  2. the immediate source of energy for all cellular activities, including muscle contraction, is
    adenosine triphosphate (ATP)
  3. in releasing it's energy, ATP is broken down into
    adenosine diphosphate (ADP)
  4. the phospagen system is composed of
    ATP and phosphocreatine (PCr)
  5. during exercise of all-out effort, stored ATP and PCr can sustain activity for
    30 sec
  6. the nonoxidative system is sometimes referred to as the
    anaerobic system because oxygen is not required for it to produce ATP
  7. in the anaerobic or nonoxidative system, what is used to produce ATP
    carbohydrates (glucose and glycogen)
  8. in the anerobic system, the breakdown of carbs creates
    lactic acid - lactate - which can contribute to muscle fatique as it accumulates
  9. the nonoxidative system is the main energy for working muscles from what times
    30 sec to 3 minutes
  10. this ATP-producing pathway is also called the "aerobic" system because oxygen is required for it to proceed
    oxidative system
  11. what is used to synthesize ATP in the oxidative system?
    carbohydrates, lipids (fats) and limited proteins
  12. the metabolic by-products from oxidative phosphorylation are _____________ and _________ and have what effect on the working muscle?
    water and carbon dioxide and have no fatiguing effects on working muscle
  13. activities lasting more than 3 minutes, with limited intensity, muscles rely on _____________ to produce ATP
    oxidative metabolism
  14. what is the disadvantage of oxidative system?
    slow in synthesizing ATP
  15. what happens if inadequate oxygen is available in nonoxidative system when the muscle is working?
    lactate accumulation = the exerise intensity at which this occurs is at the anerobic threshold or the lactate threshold
  16. to increase the ATP production capacity in the oxidative system, an athlete should
    endurance train = increase density of mitochondrial, by increasing the storage of energy substrates
  17. what type of muscle assists in regulation of blood flow to various parts of the body
    smooth muscle
  18. what type of muscle is found most in the body
    skeletal - nearly 50%
  19. whhat layer of connective tissue is found wrapped around each myodiber
  20. type IIX myosin isoform correspond to what type of muscle fiber
    type IIB - fast twitch with low oxidative potential
  21. exercise of high intensity and short duration - sprinting- mainly powered by which myofibers
    type II
  22. what theory of muscle contraction explains how protein filaments
Card Set
ACSM ch 2 HFS exam
study for ACSM HFS exam ch 2 exercise physiology