CAMPBELL BIOLOGY (18W)
12th Edition
ISBN: 9780136858256
Author: Urry
Publisher: PEARSON
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Question
Chapter 50, Problem 3TYU
Summary Introduction
Introduction:
The muscle is a soft tissue that works to build power and movement. Muscle cells produce actin and myosin protein filaments that move through each other through a contraction that alters the cell's length and shape. Calcium ions build interactions between myosin and actin proteins.
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Students have asked these similar questions
In the process of muscle contraction, which of the following steps immediately precedes the sliding of tropomyosin causing exposure of actin?
binding of acetylcholine to its receptor
binding of calcium to troponin
exocytosis of acetylcholine at NMJ
binding of myosin head to actin's active site
binding of ATP to the myosin head
In the process of muscle contraction, which of the following steps requires hydrolysis of ATP to complete?
movement of myosin head, pulling the thin filament
binding of myosin head to active site on actin
resetting of the myosin head back to its ready position
letting go of myosin head from the active site on actin
sliding of tropomyosin causing exposure of actin
The following list of events take place during a muscle contraction. Place the events in chronological order as they relate to a muscle contraction.
Calcium is released from the sarcoplasmic reticulum.
Myosin heads bind to actin.
An action potential arrives at the axon terminal of a motor neuron.
Calcium binds to troponin, displacing tropomyosin and exposing myosin head binding sites on actin.
Myosin heads undergo power stroke and actin slides over myosin towards M line of sarcomere.
Acetylcholine is released at the neuromuscular junction.
Chapter 50 Solutions
CAMPBELL BIOLOGY (18W)
Ch. 50.1 - Prob. 1CCCh. 50.1 - Prob. 2CCCh. 50.1 - Prob. 3CCCh. 50.2 - How are otoliths adaptive for burrowing mammals,...Ch. 50.2 - Prob. 2CCCh. 50.2 - Prob. 3CCCh. 50.2 - Prob. 4CCCh. 50.3 - Contrast the light-detecting organs of planarians...Ch. 50.3 - Prob. 2CCCh. 50.3 - Prob. 3CC
Ch. 50.3 - Prob. 4CCCh. 50.4 - Explain why some taste receptor cells arid all...Ch. 50.4 - Prob. 2CCCh. 50.4 - Prob. 3CCCh. 50.5 - Contrast the role of Ca2+ in the contraction of a...Ch. 50.5 - Prob. 2CCCh. 50.5 - Prob. 3CCCh. 50.6 - Contrast swimming and flying in terms of the main...Ch. 50.6 - MAKE CONNECTIONS. Peristalsis contributes to the...Ch. 50.6 - WHAT IF? When using your arms to lower yourself...Ch. 50 - Sensory receptors transduce stimulus energy and...Ch. 50 - How are music volume and pitch encoded in signals...Ch. 50 - Prob. 50.3CRCh. 50 - Prob. 50.4CRCh. 50 - What are two major functions of ATP hydrolysis in...Ch. 50 - Which of the following sensory receptors is...Ch. 50 - The middle ear converts (A) air pressure waves to...Ch. 50 - Prob. 2TYUCh. 50 - Prob. 3TYUCh. 50 - Prob. 4TYUCh. 50 - Although some sharks close their eyes just before...Ch. 50 - Prob. 6TYUCh. 50 - EVOLUTION CONNECTION In general, locomotion on...Ch. 50 - Prob. 8TYUCh. 50 - WRITE ABOUT A THEME: ORGANIZATION In a short essay...Ch. 50 - SYNTHESIZE YOUR KNOWLEDGE Bloodhounds, which are...Ch. 50 - If an egg rolls out of the nest, a mother greylag...
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Similar questions
- Skeletal muscle contraction requires _________. a. calcium ions b. ATP c. arrival of a nerve impulse d. all of the abovearrow_forwardThe _____ is the basic unit of muscle contraction. a. myofibril b. sarcomere c. muscle fiber d. myosin filamentarrow_forwardIn the process of muscle contraction, which of the following steps immediately precedes the influx of sodium into a myofiber at the neuromuscular junction? release of calcium from the terminal cisternae sliding of tropomyosin causing exposure of actin propagation of an action potential down the t-tubules binding of myosin head to actin's active site binding of acetylcholine to its receptorarrow_forward
- For the skeletal muscle, hydrolyzation of ATP: Group of answer choices At the myosin head gives rise to the generation of power stroke. At the actin G-molecule gives rise to the generation of power stroke. At the myosin head give rise to the rotation of myosin head to the "cocked back" position. At the actin G-molecule give rise to the rotation of myosin head to the "cocked back" position.arrow_forwardIn the process of muscle contraction, which of the following steps immediately comes after the propagation of an action potential down the t-tubules of a myofiber? sliding of tropomyosin causing exposure of actin binding of myosin head to actin's active site release of calcium from the terminal cisternae binding of acetylcholine to its receptor influx of sodium at the sarcolemmaarrow_forwardWe control muscle force using motor unit recruitment. When we recruit more motor units, what is happening at the organ/cell/molecular level? more myofibrils within a muscle cell are activated more muscle cells are excited the rate of crossbridge cycling is increased the number of myosin heads bound to actin within a muscle cell is increased more Ca++ is released into the cyoplasm of the muscle cellarrow_forward
- Skeletal muscle will be released in its contracted (rigor) state when: Group of answer choices ATP is hydrolyzed into forming ADP and inorganic phosphate. ATP binds to the myosin head. ADP is dissociated from the myosin head. ATP binds to the actin G-molecule.arrow_forwardIn a skeletal muscle if calcium levels in the cytosol increase, as calcium is released from the sarcoplasmic reticulum (SR,) how would this affect the position of the actin and myosin filaments? Group of answer choices Calcium released from the SR binds to calmodulin. Calmodulin activates myosin light chain kinase, causing cross bridge formation. Calcium released from the SR binds to troponin, moving tropomyosin and allowing for cross bridge formation. Calcium released from the SR binds to troponin, moving tropomyosin and inhibiting cross bridge formation. Calcium released from the SR binds to troponin, causing actin to detach from myosin. pick one answerarrow_forwardOrder the events leading to muscle contraction. Ca ions bind to troponin myosin binds to actin Nerve cell releases acetylcholine at the neuromuscular junction troponin pulls tropomyosin, exposing the mysoin binding site ATP causing myosin to move (pull) actin toward the center of the cell the sarcolemma membrane depolarizes and triggers the sarcoplamic reticulum to release Ca ionsarrow_forward
- Which of the following correctly states the importance of an action potential to muscle contration? The SR will only release Ca2+ if it has been electrically stimulated. Sarcomeres require a negative electrical charge to start sliding. Actin and myosin must be electrically charged to create a cross-bridge. ATP cannot be split into ADP and Pi without an action potential.arrow_forwardIndicate which of the following are true. Chronically shortened muscles will lose sarcomeres in series in order to maintain ideal amounts of myofilament overlap. Contractile force is proportional to the length of a muscle. Muscle organ contraction is all or nothing. Muscle cells are surrounded by an endomysium. Actin is the thick filament and Z-lines are where the cross-bridges zig-zag to adjacent actin filaments. Muscles with fewer motor units are weaker, i.e., capable of less force. A nerve impulse, calcium, and ATP are necessary for muscle contraction. Tendons attach bones to bones and help to limit the range of motion at joints. Muscle tissue is very dynamic and will respond to chronic stress by becoming stronger (making more myofilaments), chronic contraction by becoming shorter (losing sarcomeres in series), and stretching by becoming longer (adding sarcomeres in series). Myofilaments are actually long strands of proteins.arrow_forward
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