11. Which of these is the first energy source at the onset of contraction? ATP g
ID: 92031 • Letter: 1
Question
11. Which of these is the first energy source at the onset of contraction? ATP gy phosphate used be donated to ADP to make bonds that can 12. True or False: During Mus contraction the same AP that originates from the dendrite reticulum transverses the synd cie uo acuve release of Calcium from the sarcoplasmic the deep fascia unponen o muscle, which is outer most aspect 13. of a. Epimysium b, ysium c. Perimysium 14. Which is considered the unin filament? a. Myosin b. Actin c. A and myosin 15. Which one these contain heads that have an actin binding site? of a. Myosin b, Actin C. Act dad anyosi 6. Which one of these contain heads that have an ATPase binding site? a. Myosin b. Acuin c. Aciin and myosin which or is a threadlike component that lies end to end, covering actin binding sites? these coonsidered a. Tropomyosin b. Troponin c. Actin which to tropoain and cause the removal of tropomyosin of these can bind a. Na b. Cat c, Cl- ue or False: Each skeletal muscle is supplied by a nerve, artery and two veins. ue or False: Myosin contains an ATPase binding site as well as a Actin binding site. ce the neurotransmitters bind o the receptors, what happens next? a. Cat channe openExplanation / Answer
Answer:
11. (a) high energy phosphate bonds that can be donated to ADP to make ATP.
Explanation:
In case of immediate need of energy required for muscle contraction, intracellular ATP is the first energy source used at the site of contraction. Creatine phosphate donates high energy phosphate to ADP to replenish the ATP.
12. False
Explanation:
The initiation site of the AP is beyond the soma, at the axon hillock, or even further in the initial segment of the axon. When the action potential is introduced into a neuromuscular junction, it propagates into the skeletal muscle sarcoplasmic reticulum resulting in the release of calcium.
13. (a) Epimysium
Explanation:
The connective tissue that connects the individual muscle fibers is called endomysium, that wraps bundles of muscle fibers is called perimysium and the outermost layer that covers whole muscles is called epimysium.
14. (b) Actin
Explanation:
Myofibrils consists of two types of proteins: the thick filament composed of myosin and the thin filament composed of actin ( the other two components are troponin and tropomyosin)
(Since there are more than 1 question, the first 4 questions have been answered acording to the rules of Chegg)
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