Which of the following statements correctly describes properties associated with the development of skeletal muscle cells? Check all that apply A. Skeletal muscle cell are multi nucleated cells B. Skeletal muscle cells have the capacity for repair due to the actions of myosatellite cells C. Skeletal muscle cells develop via the process of mitosis D. Skeletal muscle develop from a single myoblast cell asap please
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Which of the following statements correctly describes properties associated with the development of skeletal muscle cells? Check all that apply A. Skeletal muscle cell are multi nucleated cells B. Skeletal muscle cells have the capacity for repair due to the actions of myosatellite cells C. Skeletal muscle cells develop via the process of mitosis D. Skeletal muscle develop from a single myoblast cell
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- 1 . Which of these characteristics describe smooth muscle cells, but not skeletal or cardiac muscle? Group of answer choices a . cell contraction results in some type of movement within the body b. cells become excited as they respond to stimulus from the nervous system c. cells can extend passively when the contraction phase is complete d. cells are mitotic and can divide and undergo hyperplasia as needed If the sarcolemma of the muscle cell is polarized the muscle is likely in this state Group of answer choices a. resting b. refractory c . Kansas d. neutral e. depolarized Which of the following does not correctly describe a way that muscles can be attached to bones? Group of answer choices by a ligament direct fusion to periosteum by a tendon by an aponeurosisMuscle contraction is the result of critical steps characterized by conformational changes to protein structures in the supramolecule. Which of the following conformational changes requires energy, i.e. ATP hydrolysis? A. Binding of calcium to tropomyosin changing its conformation and exposing a binding site in troponin B. Binding of myosin to troponin resulting in the power stroke and cross-bridge cycle of muscle contraction. C. Disruption in the binding of the myosin head to troponin preceding its release and relaxation back to its activated form. D. Binding of ATP to the myosin head bound to troponin.Which of the following is true concerning the role of Calcium in the contraction of muscle- cells? 23. A. skeletal muscle cells require an extracellular inward-Calcium-current to stimulate the burst of Calcium from the sarcoplasmic reticulum. B. smooth muscle cells require an extracellular inward-Calcium-current to stimulate the burst of Calcium from the sarcoplasmic reticulum. C. cardiac muscle cells require an extracellular inward-Calcium-current to stimulate the An burst of Calcium from intracellular stored-Calcium-organelles. D. No type of muscle cell requires an extracellular inward-Calcium current for normal contractile-function.
- What role (function) does calcium have within a muscle fiber? a. trigger muscle potentials along t-tubules b. trigger contraction by causing the formation of cross bridges c. trigger exocytosis of ACh across the synaptic space d. trigger action potentials along axons e. open voltage gates within the sarcoplasmic reticulum 2. Which of the following are regulatory proteins that allow a muscle fiber to contract when calcium is present? (select all that apply) dystrophin troponin myosin tropomyosin actin 3. During this phase of an action potential, potassium ions exit the cell through voltage gated potassium channels. a. depolarization b. repolarization c. glycolysis d. cross bridge formationWhat causes the striated appearance of skeletal muscle? O a. presence of gap junctions O b. regular arrangement of highly organized thick and thin filaments presence of the mitochondria at regular intervals O d. regular arrangement of the T tubules running transversely through the muscle fibreC Sliding filament model D. Sliding microtubule model filaments. They must form and dissociate repeatedly during contraction. are links between the Filamentous F-actin of thin filaments and myosin heads of thick А. Cross bridges B. Calcium switches C. Contraction cycles ! D. Power strokes 52-Calcium plays a key role during contraction of skeletal muscles. When calcium concentration is low in the intracellular compartment, myosin-binding sites on actin are blocked by intracellularly, Calcium binds to When calcium levels rise causing A. Tropomyosin, Troponin C, Tropomyosin to shift and allowing myosin to bind. B. Tropomyosin, Troponin T, Troponin C C. Troponin I, Troponin C, Troponin T D. Troponin C, Troponin T, F-actin 53-During the contraction of sarcomere, while A. A band gets bigger, H zone becomes smaller. B. Sarcomere does not change in size, H zone gets bigger C. H zone double in size, Z lines become closer D. A band does not change in size, Sarcomere becomes smaller nokanalne g…
- Considering the Types of Skeletal Muscle Fibers, people that are naturally strong weight-Lifters are probably born with a higher percentage of Whereas a person that is naturally good at long-distance running, would probably be born with a higher percentage of, 31. olim A. Fast-twitch/white fibers : Slow-twitch/dark or red fibers B. Slow-twitch/dark or red fibers : Fast-twitch/white fibers C. Intermediate/green fibers : Tertiary Intermediate/purple fibers D. Tertiary Intermediate/purple fibers : Intermediate/green fibers 36 Seonbed is:Discuss "the basal lamina of muscle fibers serves as a molecular bulletin board, in which adjoining cells can post messages that direct the differentiation and function of the underlying cells".Considering the Length-Tension Relationship of skeletal muscle fibers, over stretching a muscle fiber or not stretching a muscle fiber enough, results ina decrease in force developed (during contraction) because: 27. A. An "over-stretched" muscle fiber or an “under-stretched" muscle fiber will not allow Calcium, from the sarcoplasmic reticulum, to adequately diffuse into the cytoplasm. B. An "over-stretched" muscle fiber or an "under-stretched" muscle fiber will not allow an optimum amount of contact and overlap for the contractile proteins. C. An "over-stretched" muscle fiber or an“under-stretched" muscle fiber will not allow the Action Potential to reach the troponin-activation channels. D. An "over-stretched" muscle fiber or an "under-stretched" muscle fiber will not allow the Sodium current to depolarize the membrane. Teurons to
- Which of the following statements relating to the developmental aspects of muscles is false? a. All muscle tissue types arise from myoblasts b. Skeletal muscles become amitotic while smooth muscles regenerate throughout life c. Sarcopenia begins by age 30 and is irreversible d. Body strength per unit muscle mass is the same in both sexes e. none of the above Which of the following structures is located in the head region of the thick filament myosin? a. actin binding site b. ATP binding site c. ATPase enzyme d. all of the above e. none of the aboveburst of Calchu musc res an ldum Which of the following is true concerning the role of Calcium in the contraction of muscle- cells? 20. A. skeletal muscle cells require a burst of calcium from the sarcoplasmic reticulum. B. smooth muscle cells require a burst of calcium from the sarcoplasmic reticulum. C. cardiac muscle cells require a burst of calcium from the sarcoplasmic reticulum. D. All of the above are correct. to an ent. response to an ertraceil m-current17.For the hierarchy of skeletal muscle organization, which accurately lists the order of structures from "small" to "big"?(This is a multiple choice question choose the answer from the choices below) A.skeletal muscle; bundles of muscle fiber; myofibril; muscle fiber; sarcomere B.sarcomere; myofibril; muscle fiber; bundles of muscle fiber; skeletal muscle C.skeletal muscle; sarcomere; muscle fiber; myofibril D.None of the choices are correct.