Campbell Biology in Focus (2nd Edition)
2nd Edition
ISBN: 9780321962751
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece
Publisher: PEARSON
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Textbook Question
Chapter 39.1, Problem 1CC
Contrast the role of Ca2+ in the contraction of a skeletal muscle fiber and a smooth muscle cell.
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Contrast the role of Ca2+in the contraction of a skeletalmuscle fiber and a smooth muscle cell.
Describe the regulation of smooth muscle contraction by intracellular calcium and how cross-bridge cycling is terminated when calcium decreases again.
Discuss the similarities and differences by which Ca2+ activity is involved in initiating muscle contraction in skeletal versus smooth muscle fibers (hint: include Ca2+ sources, proteins it binds to, and signaling cascade it activates leading to contraction). (please explain in sentences, max 12 sentences)
Chapter 39 Solutions
Campbell Biology in Focus (2nd Edition)
Ch. 39.1 - Contrast the role of Ca2+ in the contraction of a...Ch. 39.1 - WHAT IF? Why are the muscles of an animal that has...Ch. 39.1 - Prob. 3CCCh. 39.2 - Prob. 1CCCh. 39.2 - Prob. 2CCCh. 39.2 - Prob. 3CCCh. 39.3 - Prob. 1CCCh. 39.3 - MAKE CONNECTIONS How is the lunar-linked rhythm of...Ch. 39.4 - How might associative learning explain why...Ch. 39.4 - Prob. 2CC
Ch. 39.4 - MAKE CONNECTIONS How might a learned behavior...Ch. 39.5 - Prob. 1CCCh. 39.5 - MAKE CONNECTIONS Balancing selection can maintain...Ch. 39.6 - Prob. 1CCCh. 39.6 - Prob. 2CCCh. 39 - During the contraction of a vertebrate skeletal...Ch. 39 - Prob. 2TYUCh. 39 - According to Hamiltons rule, A. natural selection...Ch. 39 - The binding of calcium to the troponin complex A....Ch. 39 - Curare, a substance that blocks the acetylcholine...Ch. 39 - Prob. 6TYUCh. 39 - Prob. 7TYUCh. 39 - SCIENTIFIC INQUIRY Propose a hypothesis to explain...Ch. 39 - SCIENTIFIC INQUIRY Scientists studying scrub jays...Ch. 39 - Prob. 10TYUCh. 39 - FOCUS ON INFORMATION Learning is defined as a...Ch. 39 - SYNTHESIZE YOUR KNOWLEDGE Acorn woodpeckers...
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- Explain why (a) calcium ions and (b) ACh are vital for muscle contraction.arrow_forwardDescribe the series of events that lead to smooth muscle contraction even in the absence of troponin.arrow_forwardContraction of both skeletal and smooth muscle is triggered by an increase in cytosolic Ca2+. Compare the mechanisms by which each type of muscle converts a rise in Ca2+ concentration into contraction.arrow_forward
- Describe the protein structures involved in muscle contraction.arrow_forwardDescribe the protein structures involved in muscle contraction. Illustratearrow_forwardDescribe the sequence of events by which an action potential in a motor neuron produces an action potential in the plasma membrane of a skeletal muscle fiber?arrow_forward
- Describe the functions of skeletal muscle proteins.arrow_forwardIn order to study and understand muscle diseases, one needs to have a good understanding of normal muscle function. Briefly outline the process of cross-bridge cycling in muscle contraction. Be sure to highlight the role of Ca2+ and ATP/ADP in the process.arrow_forwardIllustrate and describe the fine structure (electron micrograph) of a skeletal muscle fiber.arrow_forward
- Define what the NMJ is and why it's important for muscle contraction. Explain in short the process of the NMJ signaling the muscle to contract. Note the difference between a motor unit and the NMJ.arrow_forwardDescribe the events by which depolarization of a smooth muscle cell results in contraction and explain why smooth muscle contractions are slow and sustained.arrow_forwarda) Through which method of intercellular signaling do motor neurons communicate with muscle fibers? b) Action potentials are an “all or nothing” response, so contraction of muscle fibers downstream of the neuromuscular junction is also an “all or nothing” process. Given that this is the case, briefly describe the two ways that muscles generate varying degrees of forcearrow_forward
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