Anatomy and Physiology
9th Edition
ISBN: 9781260256000
Author: SALADIN
Publisher: MCG
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Chapter 11, Problem 3TYR
Summary Introduction
Introduction:
The skeletal muscle contraction needs the attachment of ATP to the myosin head and forms a cross bridge across the thick and thin filaments. This cross bridge forms for the muscle contraction. After ATP gets detached from the myosin head, the cross bridge gets broken. This implies that binding of ATP with the myosin head could results muscle contraction.
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The functions of tropomyosin in skeletal muscle include
A. releasing calcium ions after initiation of contraction.
B. generating ATP which it passes to the contractile mechanism.
C. binding to myosin during contraction.
D. acting as a relaxing protein at rest by covering up the sites where myosin binds to actin.
E. sliding on actin to produce shortening.
Before a skeletal muscle fiber can contract,Ca2+ must bind toa. calsequestrin.b. calmodulin.c. the myosin head.d. troponin.e. actin
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.
Chapter 11 Solutions
Anatomy and Physiology
Ch. 11.1 - Prob. 1BYGOCh. 11.1 - Prob. 2BYGOCh. 11.1 - Prob. 3BYGOCh. 11.1 - Five physiological properties of all muscular...Ch. 11.1 - Prob. 2AYLOCh. 11.1 - Prob. 3AYLOCh. 11.1 - Prob. 4AYLOCh. 11.2 - Prob. 4BYGOCh. 11.2 - Prob. 5BYGOCh. 11.2 - Prob. 6BYGO
Ch. 11.2 - Prob. 7BYGOCh. 11.2 - Prob. 1AYLOCh. 11.2 - Prob. 2AYLOCh. 11.2 - Prob. 3AYLOCh. 11.2 - Prob. 4AYLOCh. 11.2 - Prob. 5AYLOCh. 11.2 - Prob. 6AYLOCh. 11.2 - Prob. 7AYLOCh. 11.2 - Prob. 8AYLOCh. 11.2 - Prob. 9AYLOCh. 11.2 - Prob. 10AYLOCh. 11.3 - Prob. 8BYGOCh. 11.3 - Prob. 9BYGOCh. 11.3 - Prob. 10BYGOCh. 11.3 - Prob. 11BYGOCh. 11.3 - Prob. 12BYGOCh. 11.3 - Motor units; the meanings of large and small motor...Ch. 11.3 - Prob. 2AYLOCh. 11.3 - Prob. 3AYLOCh. 11.3 - Prob. 4AYLOCh. 11.3 - Prob. 5AYLOCh. 11.3 - How an action potential differs from the RMP, and...Ch. 11.4 - Prob. 13BYGOCh. 11.4 - Prob. 14BYGOCh. 11.4 - Prob. 15BYGOCh. 11.4 - Prob. 16BYGOCh. 11.4 - Prob. 1AYLOCh. 11.4 - Prob. 2AYLOCh. 11.4 - Prob. 3AYLOCh. 11.4 - Muscle relaxation; how the cessation of the nerve...Ch. 11.4 - Prob. 5AYLOCh. 11.4 - Prob. 6AYLOCh. 11.5 - Prob. 17BYGOCh. 11.5 - Prob. 18BYGOCh. 11.5 - Prob. 19BYGOCh. 11.5 - Prob. 20BYGOCh. 11.5 - Prob. 1AYLOCh. 11.5 - The phases of a muscle twitchCh. 11.5 - Prob. 3AYLOCh. 11.5 - How recruitment and tetanus are produced and how...Ch. 11.5 - Prob. 5AYLOCh. 11.6 - Prob. 21BYGOCh. 11.6 - Prob. 22BYGOCh. 11.6 - Prob. 23BYGOCh. 11.6 - Prob. 24BYGOCh. 11.6 - Prob. 25BYGOCh. 11.6 - Prob. 1AYLOCh. 11.6 - Prob. 2AYLOCh. 11.6 - The use of myoglobin and aerobic respiration to...Ch. 11.6 - Prob. 4AYLOCh. 11.6 - How anaerobic fermentation generates ATP after the...Ch. 11.6 - Why a muscle is able to switch back to aerobic...Ch. 11.6 - Prob. 7AYLOCh. 11.6 - Vo2max, it partially determines ones ability to...Ch. 11.6 - Prob. 9AYLOCh. 11.6 - Differences between slow oxidative and fast...Ch. 11.6 - Prob. 11AYLOCh. 11.6 - Examples of resistance exercise and endurance...Ch. 11.7 - Prob. 26BYGOCh. 11.7 - Prob. 27BYGOCh. 11.7 - Prob. 28BYGOCh. 11.7 - Prob. 29BYGOCh. 11.7 - Prob. 30BYGOCh. 11.7 - Prob. 1AYLOCh. 11.7 - Structural differences between cardiomyocytes and...Ch. 11.7 - Prob. 3AYLOCh. 11.7 - Prob. 4AYLOCh. 11.7 - Prob. 5AYLOCh. 11.7 - Prob. 6AYLOCh. 11.7 - Prob. 7AYLOCh. 11.7 - Prob. 8AYLOCh. 11.7 - Prob. 9AYLOCh. 11.7 - Prob. 10AYLOCh. 11.7 - Prob. 11AYLOCh. 11.7 - Prob. 12AYLOCh. 11.7 - Prob. 13AYLOCh. 11.7 - Prob. 14AYLOCh. 11.7 - The role of smooth muscle in peristalsisCh. 11.7 - Prob. 16AYLOCh. 11 - Prob. 1TYRCh. 11 - Prob. 2TYRCh. 11 - Prob. 3TYRCh. 11 - Prob. 4TYRCh. 11 - Prob. 5TYRCh. 11 - Prob. 6TYRCh. 11 - ACh receptors are found mainly in a. synaptic...Ch. 11 - Prob. 8TYRCh. 11 - Prob. 9TYRCh. 11 - Slow oxidative fibers have all of the following...Ch. 11 - Prob. 11TYRCh. 11 - Prob. 12TYRCh. 11 - Parts of the sarcoplasmic reticulum called ______...Ch. 11 - Prob. 14TYRCh. 11 - Prob. 15TYRCh. 11 - Prob. 16TYRCh. 11 - Prob. 17TYRCh. 11 - Prob. 18TYRCh. 11 - A state of continual partial muscle contraction is...Ch. 11 - Prob. 20TYRCh. 11 - Prob. 1BYMVCh. 11 - Prob. 2BYMVCh. 11 - dys-Ch. 11 - iso-Ch. 11 - Prob. 5BYMVCh. 11 - Prob. 6BYMVCh. 11 - Prob. 7BYMVCh. 11 - temporo-Ch. 11 - Prob. 9BYMVCh. 11 - Prob. 10BYMVCh. 11 - Prob. 1WWTSCh. 11 - Prob. 2WWTSCh. 11 - Prob. 3WWTSCh. 11 - Prob. 4WWTSCh. 11 - Thin filaments shorten when a muscle contracts.Ch. 11 - Smooth muscle lacks striations because it does not...Ch. 11 - Prob. 7WWTSCh. 11 - Prob. 8WWTSCh. 11 - Prob. 9WWTSCh. 11 - Prob. 10WWTSCh. 11 - Prob. 1TYCCh. 11 - Prob. 2TYCCh. 11 - Why would skeletal muscle be unsuitable for the...Ch. 11 - As skeletal muscle contracts, one or more bands of...Ch. 11 - Prob. 5TYC
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- 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.arrow_forwardCrossbridges 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_forwardWhen a skeletal muscle fiber undergoes a concentric isotonic contraction,a. M lines remain the same distance apart.b. Z lines move closer to the ends of the A bands.c. A bands become shorter.d. I bands become wider.e. M lines move closer to the end of the A band.arrow_forward
- Which of the following is a microscopic feature of a skeletal muscle fiber? a. It contains multiple nuclei that are centrally located b. it contains myoglobin for oxygen storage c. it contains glycosomes for glycogen storage d. a and b e. b and carrow_forwardAccording to the sliding filament model, when muscles contract,a. sarcomeres shorten.b. myosin heads break down ATP.c. actin slides past myosin.d. the H zone disappears.e. All of these are correctarrow_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
- During a concentric contraction of a skeletal muscle fiber, myofibrils a. lengthen. b. remain the same length. c. increase in diameter. d. shorten.arrow_forwardThe plasma membrane of a skeletal muscle fiber is called thea. sarcoplasmic reticulum.b. sarcolemma.c. sarcoplasm.d. sarcomysiumarrow_forwardSmooth muscle cells have , whereasskeletal muscle fibers do not.a. sarcoplasmic reticulumb. tropomyosinc. calmodulind. Z discse. myosin ATPasearrow_forward
- Put the following skeletal muscle contraction events in the order that they occur: a. The myosin head swivels toward the center of the sarcomere. b. Calcium ions are released from the sarcoplasmic reticulum and bind to troponin. c. An action potential is propagated along the sarcolemma and transverse tubules. d. Myosin binds to actin, forming crossbridges. e. Myosin heads bind ATP molecules and release from actin. f. Tropomyosin molecules are moved off active sites on actin. g. ATPase splits ATP, providing the energy to reset the myosin head.arrow_forwardTo make a muscle contract more strongly,the nervous system can activate more motorunits. This process is calleda. recruitment.b. summation.c. incomplete tetanus.d. twitch.e. concentric contractionarrow_forwardThe cross bridges of the sarcomere in skeletal muscle are made up of A. myelin. B. tropomyosin. C. myosin. D. actin. E. myoglobulin. F. troponin.arrow_forward
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