Biology
11th Edition
ISBN: 9781259188138
Author: Peter H Raven, George B Johnson Professor, Kenneth A. Mason Dr. Ph.D., Jonathan Losos Dr., Susan Singer
Publisher: McGraw-Hill Education
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Question
Chapter 42, Problem 5U
Summary Introduction
Introduction:
Skeletal muscle cells are arranged in bundles tied together by connective tissues and anchored at both the ends by tendons to bones and other supporting tissues. These muscles are very long, cylindrical and multinucleated. The striation reflects the regular pattern of distribution of the filaments inside the cells and multiple nuclei is located on the periphery of the cells.
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Single-unit smooth muscle cells can stimulate each other because they havea. a latch-bridge.b. diffuse junctions.c. gap junctions.d. tight junctions.e. cross-bridges.
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Unlike skeletal muscle cells, cardiac muscle cells________."
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Chapter 42 Solutions
Biology
Ch. 42 - Which of the following cavities would contain your...Ch. 42 - Epithelial tissues do all of the following except...Ch. 42 - Prob. 3UCh. 42 - Connective tissues include a diverse group of...Ch. 42 - Prob. 5UCh. 42 - Prob. 6UCh. 42 - The function of neuroglia is to a. carry messages...Ch. 42 - Skeletal muscle cells are a. large multinucleate...Ch. 42 - Connective tissues, although quite diverse in...Ch. 42 - Prob. 1A
Ch. 42 - Prob. 2ACh. 42 - Suppose that an alien virus arrives on Earth. This...Ch. 42 - Homeostasis a. is a dynamic process. b. describes...Ch. 42 - Prob. 5ACh. 42 - The three types of muscle all share a. a structure...Ch. 42 - Suppose that you discover a new disease that...Ch. 42 - Which organ systems are involved in regulation and...Ch. 42 - We have all experienced hunger pangs. Is hunger a...Ch. 42 - Why is homeostasis described as a dynamic process?...
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Similar questions
- Skeletal, smooth, and cardiac muscle are similar in that they all _____. A are divided into motor units B require calcium in order to contract C undergo mitosis frequently to replace dead or damaged cells D have small round cells connected by gap junctionsarrow_forwardCalmodulin is found in smooth muscle cells and performs a similar function to troponin in striated muscle fibers. However, calmodulin not only gets activated by Ca2+ but also slows the release of Ca2+ from the sarcoplasmic reticulum. How might this difference relate to the different kinds of contractions smooth muscles do in comparison to striated muscles?arrow_forwardAll of the following characteristics apply to skeletal muscle except a. They are striated. b. They are multinucleated. c. They are voluntary. d. They contain intercalated discs. e. They are attached to the skeleton by means of tendons.arrow_forward
- Which of the following are aspects of the structure of skeletal muscle? Select all that apply. --They are cylindrical cells called muscle fibers that have multiple nuclei. --Skeletal muscle has more mitochondria than other types of muscle cells. --The muscle fibers parallel one another and have a striated appearance. --Cells are branched or unbranched with single nuclei. --Each fiber contains stacks of many units of contraction and protein filaments.arrow_forwardWhat event causes a troponin-tropomyosin complex to regain its original shape in muscle relaxation? a. stimulation of ACh receptors b. diffusion of Na+ back into transverse tubules c. return of Ca2+ into the sarcoplasmic reticulum d. breaking of the bond with tropomyosinarrow_forwardGraph A in this diagram represents A) summation and tetanus of a smooth muscle fibre. C) a simple skeletal muscle twitch c) summation and tetanus of a skeletal muscle fibre. D)simple smooth muscle twitch.arrow_forward
- A skeletal muscle motor unit A.Is the number of muscle cells innervated by one motor neuron. B.Is the number of motor neurons innervating one muscle cell. C.Size determines the ability to control a muscle D.Size determines how much a muscle contracts at any one time.arrow_forwardChickens are capable of only brief bursts of flight, and their flying muscles consist of fast glycolytic fibers. The breast muscles of ducks, by contrast, consist of slow and fast oxidative fibers. What can you deduce about the flying abilities of ducks?arrow_forwardWhat are three muscle tissue types found among animals? Explain how each is specialized for particular functions.arrow_forward
- Contrast the role of Ca2+in the contraction of a skeletalmuscle fiber and a smooth muscle cell.arrow_forwardPredict what might happen to a muscle cell that is extensible but not elastic. What if the reverse were true— a muscle cell is elastic but not extensible?arrow_forwardWhat is special about a muscle cell does it possess any unique qualities or organelles?arrow_forward
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