LAB MANUAL FOR HUMAN A&P MAIN VERSION
4th Edition
ISBN: 9781266871016
Author: Martin
Publisher: MCG
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Textbook Question
Chapter 20, Problem 5PL
The functional contractile unit of a muscle fiber (cell) is the
a. sarcoplasm
b. sarcolemma.
c. sarcomere.
d. sarcoplasmic reticulum.
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The plasma membrane of a skeletal muscle fiber is called thea. sarcoplasmic reticulum.b. sarcolemma.c. sarcoplasm.d. sarcomysium
In a skeletal muscle fiber, a triad is composed ofa. myosin, actin, and myofibrils.b. one A band, one H zone, and one I band.c. one transverse tubule and two terminal cisternae.d. myofilaments, myofibrils, and sarcomeres.
In a skeletal muscle fiber, Ca2+ is released from a. ACh receptors. b. the motor end plate. c. the sarcoplasmic reticulum. d. the sarcolemma and T-tubules.
Chapter 20 Solutions
LAB MANUAL FOR HUMAN A&P MAIN VERSION
Ch. 20 - The outermost layer of connective tissue of a...Ch. 20 - The thick myofibril filament of a sarcomere is...Ch. 20 - The muscle primarily responsible for an action is...Ch. 20 - The neuron and the muscle fibers it innervates is...Ch. 20 - The functional contractile unit of a muscle fiber...Ch. 20 - Prob. 6PLCh. 20 - A synergistic muscle contraction assists the...Ch. 20 - The plasma membrane of a muscle fiber (cell) is...Ch. 20 - Match the terms in column A with the definitions...Ch. 20 - FIGURE 20.7 Label this transmission electron...
Ch. 20 - When stimulated to contract, the sarcomeres...Ch. 20 - Prob. 3.1ACh. 20 - The ____________ of a muscle is attached to a more...Ch. 20 - A muscle responsible for most of an action is...Ch. 20 - Assisting muscles of an agonist are called...Ch. 20 - Antagonists are muscles that resist the actions...Ch. 20 - When the forearm is extended at the elbow joint,...Ch. 20 - When the biceps brachii acts as the agonist, the...Ch. 20 - A _____________ is a synergistic muscle that will...
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- Crossbridges that form during muscle contraction are a bond between: A. Myoglobin and Troponin B. Hemoglobin and Glycogen C. Actin and Myosin D. Toponin and Tropomyosinarrow_forwardMark the following statements as true or false. If a statement is false, correct it to make a true statement. a. Muscle fibers generate more tension if the starting length of their sarcomeres is very short. b. Stimulation by a motor neuron before a muscle fiber has fully relaxed results in a condition called wave summation. c. Muscles that require a great deal of precise control will have large motor units. d. A muscle fiber changes length during isotonic concentric and isotonic eccentric contractionsarrow_forwardWhich of the following statements about the microscopic structure of smooth muscle fibers is incorrect? a. smooth muscle cells lack myofibrils, sarcomere, and t-tubules b. smooth muscle cells contain endomysium only c. smooth muscles cells contain caveolae that sequesters calcium ions d. all of the above e. none of the abovearrow_forward
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