Biology: The Unity and Diversity of Life (MindTap Course List)
14th Edition
ISBN: 9781305073951
Author: Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Publisher: Cengage Learning
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Textbook Question
Chapter 35, Problem 8SQ
In sarcomeres, phosphate-group transfers from ATP activate _______.
- a. actin
- b. myosin
- c. troponin
- d. Z bands
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According to the sliding filament model, binding sites on actin open when ________. a. creatine phosphate levels rise b. ATP levels rise c. acetylcholine levels rise d. calcium ion levels rise
A sarcomere shortens when______ . a. thick filaments shorten b. thin filaments shorten c. both thick and thin filaments shorten d. none of the above
The actin myosin bond is broken by the attachment of
A. Tropomyosin
B. Phosphate
C. ATP
D. ADP
Chapter 35 Solutions
Biology: The Unity and Diversity of Life (MindTap Course List)
Ch. 35 - An endoskeleton consists of _________. a. a fluid...Ch. 35 - Bones are __________. a. mineral reservoirs b....Ch. 35 - Bones move when __________ muscles contract. a....Ch. 35 - A ligament connects ________. a. bones at a joint...Ch. 35 - Building Better Bones Tiffany, shown in FIGURE...Ch. 35 - Building Better Bones Tiffany, shown in FIGURE...Ch. 35 - Building Better Bones Tiffany, shown in FIGURE...Ch. 35 - Building Better Bones Tiffany, shown in FIGURE...Ch. 35 - Parathyroid hormone stimulate__________. a. bone...Ch. 35 - The ___ attaches to the pelvic girdle. a. radius...
Ch. 35 - The __________ is the basic unit of contraction....Ch. 35 - In sarcomeres, phosphate-group transfers from ATP...Ch. 35 - A sarcomere shortens when ________. a. thick...Ch. 35 - Muscle fibers produce ATP by__________. a. aerobic...Ch. 35 - Prob. 11SQCh. 35 - A motor unit is _________. a. a muscle and the...Ch. 35 - __________from a motor neuron excites a muscle...Ch. 35 - Prob. 14SQCh. 35 - Match the words with their defining feature....Ch. 35 - Continued strenuous activity can cause lactate to...Ch. 35 - After death, calcium pumps no longer function and...
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- The Sarcomere 2 Thin filaments are often named for which protein? a. actin b. myosin c. troponin d. tropomyosinarrow_forwardContraction of muscles requires binding of various components of muscle fiber. Which of the following rows correctly matches two components of muscle fibre that bind with each other? Row Component of muscle fibre Component of muscle fibre A. Ca2+ myosin B. troponin myosin C. troponin tropomyosin D. actin Ca2+arrow_forwardIn relaxed muscle, the myosin-binding site on actin is blocked by ________. a. titin b. troponin c. myoglobin d. tropomyosinarrow_forward
- During muscle contraction, calicum ions bind to A. Actin Filaments B. Tropomyosin C. Troponin D. Myosin Filamentsarrow_forwardMuscle relaxation occurs when ________. a. calcium ions are actively transported out of the sarcoplasmic reticulum b. calcium ions diffuse out of the sarcoplasmic reticulum c. calcium ions are actively transported into the sarcoplasmic reticulum d. calcium ions diffuse into the sarcoplasmic reticulumarrow_forwardThe mechanism of muscle contraction is best explained by the sliding filament model. According to this model, thin ___i___ filaments slide over thick ___ii___ filaments.The statement given above is completed by information in row Row i ii A. myosin actin B. myosin myosin C. actin actin D. actin myosinarrow_forward
- Energy produced when ATP is converted to ADP and phosphate is stored in A. Myosin Heads B. Troponin C. Tropomyosin D. Actin Myofilamentsarrow_forwardUnlike skeletal muscle cells, cardiac muscle cells________." A do not use the sliding filament mechanism of contraction B are not striated C do not rely on an influx of Ca+2 for contraction to occur D do not require neural stimulation to contractarrow_forwardThe______ is the basic unit of contraction. a. osteoblast c. myofibril b. sarcomere d. myosin filamentarrow_forward
- During muscle contraction, binding sites for myosin are uncovered by the movement of A. Tropomysin B. Actin myofilaments C. ADP D. Troponinarrow_forwardThe sliding filament mechanism describes the process during which: a. actin and myosin slide relative to each other b. sarcomeres slide relative to each other c. troponin and tropomyosin slide relative to each other d. muscle fibers slide past each otherarrow_forwardWhat is released when myosin heads attach to actin filaments A. Phosphate B. ATP C. ADP D. Tropomyosinarrow_forward
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