. Which of the following statements is TRUE about the structure and arrangement
ID: 3513392 • Letter: #
Question
. Which of the following statements is TRUE about the structure and arrangement of skeletal muscle? (a) The myofibrils packed together in a structure known as the fascicle which is surrounded by the enplomysium layer (b) The myofibrils are composed of thin filaments (myosin) and thick filaments (actin) (c) Fascicles are bundles of muscle fibers that are surrounded by a perimysium layer (d) The epimysium surrounds the individual myofibrils arranged in the fascicle 2 Which of the following is FALSE about the structure of a sarcomere? (a) The sarcomere stretches from one Z line to the next Z line (b) During contraction, the I bands and the H zone narrow as the actin is pulled towards the myosin (c) The A band is only the region of overlap between the myosin fibers and the actin fibers (d) The H zone is an area of thick filaments only that can change shape during contraction Which of the following proteins are rod-shaped and occupy the longitudinal grooves on the actin helix, preventing myosin from attaching? 3.Explanation / Answer
1). C
2). B) is false
3). C) Tropomyosin
4). True
5). False
6). A)
7). C
8). A - True.
9). C) Isometric as muscle is acting against resistance.
10). True
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