Principles of Anatomy and Physiology
15th Edition
ISBN: 9781119329398
Author: Gerard J Tortora, Bryan Derrickson
Publisher: John Wiley & Sons Inc
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Chapter 4, Problem 21CP
Why is electrical excitability important to neurons and muscle fibers?
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Chapter 4 Solutions
Principles of Anatomy and Physiology
Ch. 4 - l. Define a tissue.
Ch. 4 - What are the four basic types of human tissues?Ch. 4 - 3. Which type of cell junction prevents the...Ch. 4 - Which types of cell junctions are found in...Ch. 4 - 5. Why are epithelial and connective tissues found...Ch. 4 - Describe the various layering arrangements and...Ch. 4 - What characteristics are common to all epithelial...Ch. 4 - Checkpoint 8:
How is the structure of the...Ch. 4 - Where are endothelium and mesothelium located?Ch. 4 - Prob. 10CP
Ch. 4 - In what ways does connective tissue differ from...Ch. 4 - What are the features of the cells, ground...Ch. 4 - 13. How are connective tissues classified? List...Ch. 4 - Describe how the structure of the following...Ch. 4 - What is the difference between interstitial and...Ch. 4 - 16. Define the following kinds of membranes:...Ch. 4 - Where is each type of membrane located in the...Ch. 4 - 18. Which types of muscular tissue are striated?...Ch. 4 - Which types of muscular tissue have gap junctions?Ch. 4 - 20. What are the functions of the dendrites, cell...Ch. 4 - 21. Why is electrical excitability important to...Ch. 4 - 22. How are stromal and parenchymal repair of a...Ch. 4 - What is the importance of granulation tissue?Ch. 4 - 24. What common changes occur in epithelial and...Ch. 4 - 1. Imagine that you live 50 years in the future,...Ch. 4 - 2. You are entering a “Cutest Baby Contest” and...Ch. 4 - Prob. 3CTQ
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- In a general sense, how do skeletal muscles produce movement?arrow_forwardWhich of the following step(s) about the excitation of skeletal muscle is/are incorrect? 1. Acetylcholine is released and binds to motor end plate receptors 2. An action potential is created and moves down T-tubules 3. Calcium is released from the sarcoplasmic reticulum 4. Calcium ions bind to tropomyosin to shift troponin off the binding sites for cross-bridging 5. Myosin forms cross-bridges and binds with actin to pull it towards middle of sarcomerearrow_forwardHow would exposure to a sarin or sarin-like chemical affect calcium levels inside the sarcoplasmic reticulum (SR) of a skeletal muscle? Group of answer choices An increased frequency of action potentials would lead to decreased calcium levels in the SR A decreased frequency of action potentials would lead to decreased calcium levels in the SR An increased frequency of action potentials would lead to increased calcium levels in the SR A decreased frequency of action potentials would lead to increased calcium levels in the SR pick one answerarrow_forward
- How will the function of skeletal muscle tissue in your hands be affected over time when used consistently?arrow_forwardOne of the primary characteristics of all muscle tissue is contractility, the ability to shorten (contract) and lengthen (relax). You've identified the various components of a myofibril above. Now, use the table below to indicate what occurs to each band, line, or zone when the muscle contracts vs. relaxes. What occurs to this region / structure during contraction/relaxation? Region / Structure A-Band H-Band I-Band M-Line Z-Line Zone of Overlap Sarcomere No change Shortens Lengthens Muscle Contraction Muscle Relaxationarrow_forwardWhich of the following is the smallest: muscle fiber, thick filament, or myofibril? Which is largest?arrow_forward
- Watch 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_forwardWhat basic physiological properties do a nerve cell and a muscle cell have in common? Name a physiological property of each that the other one lacks.arrow_forwardHow is resting membrane potential established in a neuron and muscle cell?arrow_forward
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