![Biochemistry](https://www.bartleby.com/isbn_cover_images/9781319114671/9781319114671_smallCoverImage.jpg)
Biochemistry
9th Edition
ISBN: 9781319114671
Author: Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher: W. H. Freeman
expand_more
expand_more
format_list_bulleted
Concept explainers
Question
A typical relaxed sarcomere is about 2.3 μm in length and contracts to about
2 μm in length. Within the sarcomere, the thin filaments are about 1 μm
long and the thick filaments are about 1.5 μm long.
(a) Describe the overlap of thick and thin filaments in the relaxed and contracted sarcomere.
(b) An individual “step” by a myosin head in one cycle pulls the thin filament
about 15 nm. How many steps must each actin fiber make in one contraction?
Expert Solution
![Check Mark](/static/check-mark.png)
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
This is a popular solution
Trending nowThis is a popular solution!
Step by stepSolved in 3 steps with 1 images
![Blurred answer](/static/blurred-answer.jpg)
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biochemistry and related others by exploring similar questions and additional content below.Similar questions
- 72.13.2arrow_forwardThick and thin myofilaments have different properties. For each phrase below, indicate whether the filament described is thick or thin (write thick or thin in the blanks).__(1) contains myosin heads__(2) contains actin__(3) does not lie in the H zone__(4) contains myosin__(5) attaches to a Z disc__(6) does not lie in the I bandarrow_forwardWhich of these events occurs during the team phase, just when a muscle has been stimulated? a) Ca2 + binds to troponin b) ATP is broken down into ADP c) active transport of Ca2 + into the sarcoplamate reticle d) sarcomeres are abbreviatedarrow_forward
- Place these structures in order from LARGEST structure to SMALLEST: A) Myofibril B) Myofilament (MYOSIN) 1 C) Muscle Body D) Muscle Bundle (Fascicle) E) Muscle Fiber F) Myofilament (ACTIN)arrow_forward15) what role does calcium play in muscle contraction? a) calcium is not involved in skeletal muscle contraction b) it binds to tropomyosin and moves Tripp in away from the myosin binding sit on the actin molecules c) it's binds to Troponin and moves tropomyosin away from the actin binding sit on the myosin molecules d) it binds to troponin and moves tropomyosin away from the myosin binding site on the actin molearrow_forwardGive typed explanation Put the events of a single cross-bridge cycle in the proper order. Start with Calcium is released from the sarcoplasmic reticulum. a) myosin binds to actin b) ATP binds to myosin, cross-bridge disconnect c) ATP splits into ADP and Pi d) Myosin head re-energized, repositions into high energy state e) Calcium resequestered into sarcoplasmic reticulum f) Cross-bridge power stroke g) Calcium binds to troponin , and actin binding sites are exposedarrow_forward
- 2 a) What does calcium do in a skeletal muscle cell and where in the cell does it come from? b) John’s Stetson (his hat) blew off his head in a strong wind and he sprinted down the hill to retrieve it. Where did his ATP come from in the first 6 seconds and the next 8 seconds of his run?arrow_forwardCofilin preferentially binds to older actin filamentsand promotes their disassembly. How does cofilin distin-guish old filaments from new ones?arrow_forwardWhen a muscle fiber is stimulated with repeated stimuli, the contraction force is summed due to: a) an increasing number of engine units recruit b) the number of actin / myosin bonds decreases c) increased strength of the action potential in the plasma membrane d) The Ca2 + concentration around and in the myofibrils increasesarrow_forward
- What is the micro anatomical arrangement of a skeletal muscle fiber cell?arrow_forward34) what happens to skeletal muscle if there is no ATP present but plenty of calcium. Be specific relative to the sliding filament theory.arrow_forwardWhich of the following labeled zones in the electron micrograph of the sarcomere shortens during contraction? OA) B) -E C) 00) D E) -C -8arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- BiochemistryBiochemistryISBN:9781319114671Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.Publisher:W. H. FreemanLehninger Principles of BiochemistryBiochemistryISBN:9781464126116Author:David L. Nelson, Michael M. CoxPublisher:W. H. FreemanFundamentals of Biochemistry: Life at the Molecul...BiochemistryISBN:9781118918401Author:Donald Voet, Judith G. Voet, Charlotte W. PrattPublisher:WILEY
- BiochemistryBiochemistryISBN:9781305961135Author:Mary K. Campbell, Shawn O. Farrell, Owen M. McDougalPublisher:Cengage LearningBiochemistryBiochemistryISBN:9781305577206Author:Reginald H. Garrett, Charles M. GrishamPublisher:Cengage LearningFundamentals of General, Organic, and Biological ...BiochemistryISBN:9780134015187Author:John E. McMurry, David S. Ballantine, Carl A. Hoeger, Virginia E. PetersonPublisher:PEARSON
![Text book image](https://www.bartleby.com/isbn_cover_images/9781319114671/9781319114671_smallCoverImage.jpg)
Biochemistry
Biochemistry
ISBN:9781319114671
Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher:W. H. Freeman
![Text book image](https://www.bartleby.com/isbn_cover_images/9781464126116/9781464126116_smallCoverImage.gif)
Lehninger Principles of Biochemistry
Biochemistry
ISBN:9781464126116
Author:David L. Nelson, Michael M. Cox
Publisher:W. H. Freeman
![Text book image](https://www.bartleby.com/isbn_cover_images/9781118918401/9781118918401_smallCoverImage.gif)
Fundamentals of Biochemistry: Life at the Molecul...
Biochemistry
ISBN:9781118918401
Author:Donald Voet, Judith G. Voet, Charlotte W. Pratt
Publisher:WILEY
![Text book image](https://www.bartleby.com/isbn_cover_images/9781305961135/9781305961135_smallCoverImage.gif)
Biochemistry
Biochemistry
ISBN:9781305961135
Author:Mary K. Campbell, Shawn O. Farrell, Owen M. McDougal
Publisher:Cengage Learning
![Text book image](https://www.bartleby.com/isbn_cover_images/9781305577206/9781305577206_smallCoverImage.gif)
Biochemistry
Biochemistry
ISBN:9781305577206
Author:Reginald H. Garrett, Charles M. Grisham
Publisher:Cengage Learning
![Text book image](https://www.bartleby.com/isbn_cover_images/9780134015187/9780134015187_smallCoverImage.gif)
Fundamentals of General, Organic, and Biological ...
Biochemistry
ISBN:9780134015187
Author:John E. McMurry, David S. Ballantine, Carl A. Hoeger, Virginia E. Peterson
Publisher:PEARSON