Connect Access Card for Biology: Concepts and Investigations
4th Edition
ISBN: 9781259870033
Author: Mariëlle Hoefnagels Dr.
Publisher: McGraw-Hill Education
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Question
Chapter 29, Problem 4MCQ
Summary Introduction
Introduction:
The muscle fibers are composed of thick myosin filaments and thin actin filaments. The arrangement of the bundles of these filaments is called as a sarcomere. They form synapses at the neuromuscular junctions with the motor neurons. This initiates in the conduction of the impulses in the neurons.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
Which of the following statements best describes the sliding filament mechanism of muscle contraction?
a. Actin and myosin filaments do not shorten, but rather, slide past each other.
b. Actin and myosin filaments shorten and slide past each other.
c. As they slide past each other, actin filaments shorten, but myosin filaments do not shorten.
d. As they slide past each other, myosin filaments shorten, but actin filaments do not shorten.
Pick the list that has the order from the smallest to the larges
a) Sarcomere , Myofibrilactin , myosin
b) Actin, Sarcomere, Myofibril, Muscle fiber
c) Actin Sarcomere, Myofibril , Muscle, Myosin
d) Muscle fiber, myofibril, actin, myosin , sarcomere
What happens when myosin filaments hydrolyze ATP molecules in muscles?
a.
Actin–myosin complexes dissociate, leading to muscle contraction.
b.
Actin–myosin complexes dissociate, leading to muscle relaxation.
c.
Actin–myosin complexes are formed, leading to muscle contraction.
d.
Actin–myosin complexes are formed, leading to muscle relaxation.
Chapter 29 Solutions
Connect Access Card for Biology: Concepts and Investigations
Ch. 29.1 - How do the skeletal and muscular systems interact?Ch. 29.1 - Prob. 2MCCh. 29.2 - What are the components of the axial and...Ch. 29.2 - Prob. 2MCCh. 29.3 - Prob. 1MCCh. 29.3 - What are the differences between spongy bone and...Ch. 29.3 - Prob. 3MCCh. 29.3 - Prob. 4MCCh. 29.3 - Prob. 5MCCh. 29.4 - Prob. 1MC
Ch. 29.4 - Prob. 2MCCh. 29.4 - How do ATP, motor neurons, and calcium ions...Ch. 29.5 - Prob. 1MCCh. 29.5 - Prob. 2MCCh. 29.6 - Prob. 1MCCh. 29.6 - Prob. 2MCCh. 29.6 - Prob. 3MCCh. 29.7 - Prob. 1MCCh. 29.7 - Prob. 2MCCh. 29 - The axial skeleton is to the appendicular skeleton...Ch. 29 - Prob. 2MCQCh. 29 - Prob. 3MCQCh. 29 - Prob. 4MCQCh. 29 - Prob. 5MCQCh. 29 - Within the first few seconds of a 5- minute race,...Ch. 29 - Distinguish among a hydrostatic skeleton, an...Ch. 29 - Use the Internet to research bone marrow...Ch. 29 - Prob. 3WIOCh. 29 - Prob. 4WIOCh. 29 - Design an experiment to test whether changes in...Ch. 29 - Prob. 6WIOCh. 29 - Describe four muscle proteins and their functions.Ch. 29 - Prob. 8WIOCh. 29 - Prob. 9WIOCh. 29 - Write the sequence of events that leads to a...Ch. 29 - Prob. 11WIOCh. 29 - Refer to figure 29.24 and the chapter content to...Ch. 29 - 2. How do bones help maintain blood calcium...Ch. 29 - 3. Add exercise to the concept map in at least...
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Which component is responsible for initially stimulating a muscle contraction? a. proteins b. electrochemical signals c. plasma membranes d. striationsarrow_forwardWhich of the following changes takes place when a skeletal muscle contracts?A. Z discs move farther apart.B. Actin filaments contract.C. Myosin filaments contract.D. Sarcomeres become shorter.arrow_forwardWhich of the following statements about skeletal muscle is CORRECT? Select one: a. An increase in Na+ concentration in the cytosol starts muscle filament sliding. b. The muscle is non-striated and involuntary. c. The muscle is involved in shivering thermogenesis. d. The muscle contracts in response to parasympathetic stimulation. e. The muscle contracts in response to hormones.arrow_forward
- When sarcomeres contract during muscle contraction, which of the following occurs? A. The myosin filaments lengthen. B. The myosin filaments "walk" along the actin microfilaments. C. The myosin filaments shorten. D. The actin filaments shorten.arrow_forwardmuscle cells are made up of? A. Z bars b. actin c. myosin d. myofibrilsarrow_forwardA scientist extracts and measures the calcium content of one of your muscle fibers while you are asleep, when all of your muscles are relaxed. Where is the scientist likely to find calcium? In the T-tubules In the sarcoplasmic reticulum Bound to tropomyosin Bound to troponinarrow_forward
- Unlike 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_forwardWhat happens to sarcomeres when actin and myosin filaments in a muscle fiber interact during the contraction phase? A) sarcomeres usually fatigue B) sarcomeres usually get shorter C) sarcomeres usually get longer D) sarcomeres stay the samearrow_forwardIn muscle cells, magnesium ions compete with calcium ions for binding sites on troponin molecules. If a person has too high a concentration of magnesium ions in the blood, magnesium ions can prevent calcium ions from binding troponin. A) What effect would this have on muscle contraction (strengthen, weaken, or no effect)? B) Use your knowledge of how muscle fibers contract to explain your answer in part A.arrow_forward
- When a muscle fiber is stretched from 60% of its optimal length to Lo, what change or changes are happening on the cellular level (MULTIPLE SELECT)? A. Increased calcium release from the SR B. Increased firing of action potentials from the alpha motor neuron C. Increased rate of myosin ATPase activity D. Increased number of actin-myosin bridges E. Increased stretch on titin, producing more passive forcearrow_forwardWhich is a false statement about skeletal muscle structure?a. A myofibril is composed of multiple muscle fibers.b. Most skeletal muscles attach to bones by connective-tissue tendons.c. Each end of a thick filament is surrounded by six thin filaments.d. A cross-bridge is a portion of the myosin molecule.e. Thin filaments contain actin, tropomyosin, and troponin.arrow_forwardPick the right order for muscle contraction a) ATP attaches to myosin, muscle cell uses calcium, action potential spreads b) Calcium release, binding sites on actin are exposedmyosin binds to actin c) Myosin binds to actin, myosin uses calcium, cell gets shorter d) Action potential is received , cell gets shorter, myosin grabs actinarrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Concepts of BiologyBiologyISBN:9781938168116Author:Samantha Fowler, Rebecca Roush, James WisePublisher:OpenStax College
Concepts of Biology
Biology
ISBN:9781938168116
Author:Samantha Fowler, Rebecca Roush, James Wise
Publisher:OpenStax College
GCSE PE - ANTAGONISTIC MUSCLE ACTION - Anatomy and Physiology (Skeletal and Muscular System - 1.5); Author: igpe_complete;https://www.youtube.com/watch?v=6hm_9jQRoO4;License: Standard Youtube License