Campbell Biology
12th Edition
ISBN: 9780135188743
Author: Urry
Publisher: PEARSON
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Chapter 20.3, Problem 3CC
Summary Introduction
To propose: An experiment to direct an embryonic stem cell or iPS cell to develop into a muscle cell.
Concept introduction:
Embryonic stem cells or iPS (induced pluripotent) cells are undifferentiated cells and can develop into different cell types. They are stimulated to differentiate into specific cell types by different culture media, or modifying the cells by insertion of particular genes. Genetic engineering is the process of insertion of a target DNA segment consisting of a gene of interest from one organism to another. The inserted DNA segment expresses in the new genetically engineered organism.
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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
asap please
1.Describe the importance of molecular motors in the human body and the state the meaning of molecular motors.
2.Describe the different classes of molecular motors and give examples.
3.Describe the different types of myosin
The role of tropomyosin in a muscle cell is to ____.
all to cell to relax by blocking the binding sites on actin
facilitate the formation of cross-bridges between actin and myosin
Interactions between thick and thin filaments during muscle contraction occur in which sequence?
"attach to actin, detach from actin, pivot in powerstroke, return or recock"
"attach to actin, pivot in powerstroke, detach from actin, return or recock"
"attach to actin, pivot in powerstroke, return or recock, detach from actin"
"detach from actin,pivot in powerstroke, attach to actin, return or recock"
What is the role of calcium pump in muscle contractions?
pump calcium out of the sarcoplasmic reticulum against its concentration gradient to initiate contractions
remove calcium from the fluid surrounding the myofibrils to end contractions
pump calcium into the muscle cell to stimulate the release of acetylcholine
Chapter 20 Solutions
Campbell Biology
Ch. 20.1 - Prob. 1CCCh. 20.1 - DRAW IT One Strand of a DNA molecule has the...Ch. 20.1 - What are some potential difficulties in using...Ch. 20.1 - VISUAL SKILLS Compare Figure 20.7 with Figure...Ch. 20.2 - Prob. 1CCCh. 20.2 - Prob. 2CCCh. 20.3 - Based on current knowledge, how would you explain...Ch. 20.3 - Prob. 2CCCh. 20.3 - Prob. 3CCCh. 20.4 - What is the advantage of using stem cells for gene...
Ch. 20.4 - Prob. 2CCCh. 20.4 - Prob. 3CCCh. 20 - Describe how the process of gene doning results in...Ch. 20 - What useful Information is obtained by detecting...Ch. 20 - Describe how, using mice. a researcher could carry...Ch. 20 - What factors affecf whether a given genetic...Ch. 20 - In DNA technology, the term vector can refer to...Ch. 20 - Which of the following tools of DNA technology is...Ch. 20 - Prob. 3TYUCh. 20 - A paleontologist has recovered a bit of tissue...Ch. 20 - Which of the following is not true of cDNA...Ch. 20 - Expression of a cloned eukaryotic gene in a...Ch. 20 - Which Ii of the following sequences in...Ch. 20 - Prob. 8TYUCh. 20 - MAKE CONNECTIONS Looking at Figure 20.15, what...Ch. 20 - DRAW IT You are cloning an aardvark gene, using a...Ch. 20 - EVOLUTlON CONNECTION Ethical considerations aside,...Ch. 20 - Prob. 12TYUCh. 20 - Prob. 13TYUCh. 20 - Prob. 14TYU
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- 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".arrow_forwardDescribe the movement of myosin along an actin filament. Outline the primary molecular steps and explain how this process is used by cells. How many actin monomers within an actin filament would a myosin molecule need to ratchet in order to contract a cell by approximately 1 um? How fast could a non-muscle cell make this contraction compared to a muscle cell if the relative rates of myosin walks on F-actin are 4.5 um/sec and 0.04 um/sec for myosin II and I respectively?arrow_forwardWatch this video (http://openstaxcollege.org/l/micromacro) to learn more about macro- and microstructures of skeletal muscles. (a) What are the names of the junction points between sarcomeres? (b) What are the names of the subunits within the myofibrils that run the length of skeletal muscle fibers? (c) What is the “double strand of pearls� described in the video? (d) What gives a skeletal muscle fiber its striated appearance?arrow_forward
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- Hi, I only need the answer for this particular question, if that's ok: The swo-1 a mutation leads to worms with more body wall muscle, whereas worms with the swo-1 b mutation are not able to move. Based on these phenotypes and the findings from questions 3 and 4, describe the role thewild-type version of this protein plays in muscle function. Thank you!arrow_forwardExplain with the help of diagram Myosin-binding site exposedContractionarrow_forwardWhat is the main order histological structure of sarcomere? * Z line bind with actine without interaction with myosin Interaction of actine and myosin with Z line Interaction of myosin and actine with Z line Interaction of Z line with myosin and actinearrow_forward
- What are the steps of the sliding filament model? Select all that apply. Sarcomeres are in a relaxed state, in which myosin-binding sites on actin are blocked. When a nervous signal excites the muscle, myosin-binding sites on actin open up and myosin binds to actin. The myosin heads hydrolyze ATP to ADP and P. The binding of myosin to actin releases phosphate and triggers a power stroke. ATP binds to myosin, and the myosin releases its grip on actin, returning to a relaxed state.arrow_forwardFirst, explain how resting membrane potential is established in terms of ion concentration and electric charge. Next, explain the process of neural signal transmission from an alpha motor neuron to the muscle fiber. Do this by explaining how an AP is generated (ions and membrane proteins) at the neuron, how the signal is propagated, what happens at the axon terminal, what happens at the motor endplate, and explain all the molecular events that occur to cause muscle contraction.arrow_forwardThe CrossFit workouts you and River perform consist of many bodyweight activities like pushups, pull-ups, and squats. Based on what you have been learning about muscles, what specific events are taking place at the cellular and molecular level of actin and myosin that allow you to AEROBICALLY CONTRACT muscles during these workouts? Hint! Make sure to include in your answer: Ca2+, sliding filament model, and ATParrow_forward
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