characterized by all of the following EXCEPT: O a) used in endurance type of activities b) contract rapidly and forcefully O c) resistant to fatigue O d) have a direct relationship to the oxidative energy system
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- What is the function of the sarcoplasmic reticulum in muscle cell contraction?Fast twitch muscle fibers are characterized by all of the following EXCEPT: a) fatigue resistant O b) direct relationship to the anaerobic energy system O c) rapid contraction O d) used in sprintingWhich of the following would be recruited in a muscle stimulation when contractile strength increases? A) Many small motor units with the ability to stimulate other motor units B) Motor units with the longest muscle fibers C) Motor units with larger, less excitable neurons D) Large motor units with small, highly excitable endurance
- 3) List and define the organizational structure of skeletal muscle beginning with the sacrcomere up ABC to a whole muscle. 4) Explain the differences between the zones and bands of a sarcomere. 5) List and explain the differences between contractile and non-contractile proteins. 6) What are the agonists, synergists, and antagonists to go from sitting to standing from a chair. 7) Provide an every day example of each of the 3 types of muscle actions. Name the muscle involved as well as the movement. 8) Why do we store energy as ATP and resynthesize it, instead of just storing all we need. 9) What are the differences between resting, steady state, and maximal metabolic rate? 10) Why would someone measure arm circumference? How would that be helpful? 11) MRI results in a grayscale of 0 (black) to 256 (white) for each pixel of tissue. How do we tell the difference between different types of tissue in the cross section of a limb (arm or leg, e.g. what's the difference between muscle and fat,…18) Which of the following is NOT correct statement regarding muscle fatigue? A) Gradual increase in effort required to maintain a constant submaximal task B) There are two types of muscle fatigues, peripheral fatigue and central fatigue C) Force declines sooner & to a greater extent than velocity D) Slow oxidative muscles are less resistant to fatigue than fast glycolytic muscles 19) Which statement is NOT correct regarding disuse atrophy and skeletal muscle? A) Protein synthesis is decreased B) Protein degradation is increased C) There is a myofiber transition towards a slower more oxidative muscle D) Anabolic hormones and growth factors cannot completely off set disuse atrophyWhich of these is the proper sequence of these events of muscle contraction 1) Action potential propagating down into the T-tubule 2) Power stroke 3) Ca+2 is released from the sarcoplasmic reticulum 4) The tropomyosin shifts out of the way thereby exposing the active sites of the actin Question 7 options: a) 1 à 3 à 4 à 2 b) 4 à 3 à 2 à 1 c) 1 à 4 à 2 à 3 d) 3 à 1 à 4 à 2
- Which of the following causes ( the state of ) rigor in skeletal muscle ?a) lack of atp b) decrease of intracellular ca2plus c) increase in intracellular ca2+ d) lack of action potential in motor neuronsSkeletal muscle contraction is influenced by A) frequency of stimulation B) calcium release from the sarcoplasmic reticulum C) dihydropyridine receptors D) ryanodine receptors E) all of the aboveGraph A in this diagram represents A) summation and tetanus of a smooth muscle fibre. C) a simple skeletal muscle twitch c) summation and tetanus of a skeletal muscle fibre. D)simple smooth muscle twitch.
- Muscular endurance is defined as the: O a) ability of a muscle to contract repeatedly over an extended period of time b) amount of force a muscle can produce with a single maximal effort O c) ability to move the joints through a full range of motion O d) amount of time required to contract a muscle completelyWhich is the best explanation for the increased force of contraction that occurs with each successive contraction during treppe? Question 3 options: a) myosin heads are more elastic b) calcium is more readily available c) creatine kinase has more substrate to act upon. d) action potentials travel at a slower speed when muscle is warm.a) Describe how the isolated muscle behaved as it was stretched progressively. b) What effect does stretching the muscle have on contraction strength? Is this effect linear? c) What stretch resulted in the highest contraction force? What happens to the muscle at the highest stretch levels?
