Biology (MindTap Course List)
11th Edition
ISBN: 9781337392938
Author: Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg
Publisher: Cengage Learning
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Chapter 40, Problem 3TYU
Test Your Understanding
3. An energy storage compound that can be stockpiled in muscle cells for short-term use is (a) myoglobin (b) ADP (c) troponin (d) myosin (e) creatine phosphate
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Muscle contraction experiment.
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The CrossFit workouts you and River perform consist of many bodyweight activities like pushups, pull-ups, and squats. Based on what you have been learning about muscles, what specific events are taking place at the cellular and molecular level of actin and myosin that allow you to AEROBICALLY CONTRACT muscles during these workouts?
Hint! Make sure to include in your answer: Ca2+, sliding filament model, and ATP
On the molecular level, why does lifting weights consume energy? A. To contract a muscle, acetylcholine binds and pulls calcium ions. ATP binding and hydrolysis are required in the cycle of acetylcholine and calcium-binding and unbinding. B. To contract a muscle, myosin and actin filaments shorten, requiring ATP binding and hydrolysis. O C. To contract a muscle, myosin binds and pulls actin, ATP binding and hydrolysis are required in the cycle of myosin and actin-binding and unbinding. D. To contract a muscle, acetylcholine and calcium filaments shorten, requiring ATP binding and hydrolysis.
Chapter 40 Solutions
Biology (MindTap Course List)
Ch. 40.1 - Compare the functions of the epithelial coverings...Ch. 40.1 - Prob. 2LOCh. 40.1 - Prob. 1CCh. 40.1 - Prob. 2CCh. 40.1 - Prob. 3CCh. 40.1 - Prob. 4CCh. 40.2 - Compare the structure and functions of different...Ch. 40.2 - Describe the main divisions of the vertebrate...Ch. 40.2 - Prob. 5LOCh. 40.2 - Prob. 6LO
Ch. 40.2 - Prob. 1CCh. 40.2 - Prob. 2CCh. 40.2 - Prob. 3CCh. 40.2 - Prob. 4CCh. 40.3 - Prob. 7LOCh. 40.3 - Prob. 8LOCh. 40.3 - Prob. 9LOCh. 40.3 - Compare the roles of glycogen, creatine phosphate,...Ch. 40.3 - Compare the structures and functions of the three...Ch. 40.3 - Prob. 12LOCh. 40.3 - Prob. 1CCh. 40.3 - Prob. 2CCh. 40.3 - Prob. 3CCh. 40.3 - Prob. 4CCh. 40 - Prob. 1TYUCh. 40 - Prob. 2TYUCh. 40 - Test Your Understanding 3. An energy storage...Ch. 40 - Prob. 4TYUCh. 40 - Prob. 5TYUCh. 40 - Prob. 6TYUCh. 40 - Prob. 7TYUCh. 40 - Prob. 8TYUCh. 40 - Evaluate and Synthesize 9. INTERPRET DATA Examine...Ch. 40 - Prob. 10TYUCh. 40 - Prob. 11TYUCh. 40 - Prob. 12TYUCh. 40 - Prob. 13TYUCh. 40 - Prob. 14TYU
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- 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_forwardThe release of calcium ions initiates muscle contractions. Watch this video (http://openstaxcollege.org/l/calciumrole) to learn more about the role of calcium. (a) What are “T-tubules� and what is their role? (b) Please also describe how actin-binding sites are made available for cross-bridging with myosin heads during contraction.arrow_forwardEvaluate and Synthesize 9. INTERPRET DATA Examine Figure 40-13. Based on the summation of two stimuli shown in that graph, draw a curve showing summation when the muscle fiber is stimulated three times. Figure 40-13 Summation and tetanusarrow_forward
- Muscle contraction experiment. What will happen if salt was added to a glycerinated skeletal muscle, then 0.25% ATP is added after.arrow_forward“Form reflects function” is a statement that applies to the skeletal system. What evidence can you provide from your lab work that differences in the skeletons of a frog and human are related to locomotor function? In a bat compared to a human? Provide at least two pieces of evidence for each comparison.arrow_forwardWHAT IF? Why are the muscles of an animal that hasrecently died likely to be stiff?arrow_forward
- Predict 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_forward1. The dark A band of a sarcomere contains regions where the actin and myosin filaments overlap. True False 2. Thin filaments (actin) contain active sites for myosin attachment. True False 3. Which of the following does NOT accurately describe titin? a large protein found in sarcomeres prevents sarcomeres from changing in length during muscle contractions helps hold myosin filaments in place helps give muscle fibers their elasticityarrow_forwardCan you match the sacromere anatomy with the proper answer from the list below the table graph? Sarcomere Anatomy Description/Reaction Thin Filaments ? Thick Filaments ? A Band ? I Band ? M Line ? H Zone ? Z Disc ? A) G-Actin, F-Actin, Troponin, Tropomyosin B) Myosin C) Bisected by the M Line, this area shows only the thick filaments without any thin filamentous overlap D) The point of origin for myosin filaments found in the center of the sarcomere E) An area in the center of the sarcomere marked by the entire length of the thick filaments F) A space between sarcomeres with the z-disc in the center; this region shows Actin's anchorage points and extension without myosin overlap G) Anchoring point for the thin filamentsarrow_forward
- The release of calcium ions initiates muscle contractions.Watch this video (http://openstaxcollege.org/l/calciumrole) to learn more about the role of calcium. (a)What are “T-tubules” and what is their role? (b) Pleasealso describe how actin-binding sites are made available forcross-bridging with myosin heads during contraction.arrow_forwardDiscuss "the basal lamina of muscle fibers serves as a molecular bulletin board, in which adjoining cells can post messages that direct the differentiation and function of the underlying cells".arrow_forward6. Explain what how the muscles cell maintains resting membrane potential and explain the two main parts of an action potential. Include type of channels and pumps 7. Describe the events at the neuromuscular....arrow_forward
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