Seeley's Anatomy & Physiology
11th Edition
ISBN: 9781259254963
Author: Jennifer Regan (author), Andrew Russo (author), Rod Seeley (author) Cinnamon Vanputte (author)
Publisher: McGraw Hill Higher Education
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 9, Problem 15RAC
Considering the force of contraction of a skeletal muscle fiber, wave summation occurs because of
a. increased strength of action potentials on the plasma membrane.
b. a decreased number of cross-bridges formed.
c. an increase in Ca2+ concentration around the myofibrils.
d. an increased number of motor units recruited.
c. increased permeability of the sarcolemma to Ca2+ .
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
During a concentric contraction of a skeletal muscle fiber, myofibrils a. lengthen. b. remain the same length. c. increase in diameter. d. shorten.
Before a skeletal muscle fiber can contract,Ca2+ must bind toa. calsequestrin.b. calmodulin.c. the myosin head.d. troponin.e. actin
The contractile response in skeletal muscle
A. produces more work when the muscle contracts isometrically than the muscle contracts isotonically.
B. does not last as long as the action potential.
C. produces more tension when the muscle contracts isometrically than when the muscle contracts isotonically.
D. starts after the action potential is over.
E. decreases in magnitude with repeated stimulation.
Chapter 9 Solutions
Seeley's Anatomy & Physiology
Ch. 9.1 - List and describe the functions performed by...Ch. 9.1 - State the functions of smooth and cardiac muscle...Ch. 9.1 - Using table 9.1, distinguish among skeletal,...Ch. 9.2 - Identify the four specialized functional...Ch. 9.2 - Outline the differences in control and function...Ch. 9.3 - Name the connective tissue layers that surround...Ch. 9.3 - What are motor neurons? How do the axons of motor...Ch. 9.3 - What is the origin of muscle fibers? How do you...Ch. 9.3 - What are T tubules and the sarcoplasmic reticulum?Ch. 9.3 - Prob. 10AYP
Ch. 9.3 - Prob. 11AYPCh. 9.3 - Prob. 12AYPCh. 9.3 - Prob. 13AYPCh. 9.3 - Prob. 14AYPCh. 9.3 - Prob. 15AYPCh. 9.3 - Prob. 16AYPCh. 9.3 - Prob. 17AYPCh. 9.4 - What type of ion channel contributes to the...Ch. 9.4 - What are the two types of gated ion channels in...Ch. 9.4 - Prob. 20AYPCh. 9.4 - Prob. 21AYPCh. 9.4 - List the two types of voltage-gated channels the...Ch. 9.4 - Prob. 23AYPCh. 9.4 - Prob. 24AYPCh. 9.4 - Prob. 25AYPCh. 9.4 - Prob. 26AYPCh. 9.4 - Describe the structure of a neuromuscular...Ch. 9.4 - Prob. 28AYPCh. 9.4 - Prob. 29AYPCh. 9.4 - Prob. 30AYPCh. 9.4 - Prob. 31AYPCh. 9.4 - What ion is necessary for movement of the...Ch. 9.4 - Describe the steps in cross-bridge cycling. How is...Ch. 9.4 - Prob. 34AYPCh. 9.5 - List the phases of a muscle twitch, and describe...Ch. 9.5 - Prob. 36AYPCh. 9.5 - Prob. 37AYPCh. 9.5 - Prob. 38AYPCh. 9.5 - Prob. 39AYPCh. 9.5 - How does the lack of on unresponsive period in...Ch. 9.5 - Distinguish between active tension and passive...Ch. 9.5 - Prob. 42AYPCh. 9.5 - Prob. 43AYPCh. 9.5 - What is muscle tone, and how is it maintained?Ch. 9.6 - Contrast the structural and physiological...Ch. 9.6 - Prob. 46AYPCh. 9.6 - Prob. 47AYPCh. 9.6 - What factors contribute to increases in muscle...Ch. 9.6 - Prob. 49AYPCh. 9.6 - Prob. 50AYPCh. 9.7 - What is fatigue? List the three locations where...Ch. 9.7 - Prob. 52AYPCh. 9.7 - Prob. 53AYPCh. 9.7 - List the energy sources used to synthesize ATP for...Ch. 9.7 - Prob. 55AYPCh. 9.7 - Prob. 56AYPCh. 9.7 - Prob. 57AYPCh. 9.7 - Prob. 58AYPCh. 9.8 - Describe a typical smooth muscle cell. How do its...Ch. 9.8 - Prob. 60AYPCh. 9.8 - Prob. 61AYPCh. 9.8 - Compare visceral smooth muscle and multiunit...Ch. 9.8 - Prob. 63AYPCh. 9.8 - Prob. 64AYPCh. 9.8 - How are spontoneous contractions produced in...Ch. 9.8 - Prob. 66AYPCh. 9.8 - Prob. 67AYPCh. 9.8 - Prob. 68AYPCh. 9.9 - Prob. 69AYPCh. 9.9 - Prob. 70AYPCh. 9.10 - Prob. 71AYPCh. 9 - Which of these is true of skeletal muscle? a....Ch. 9 - Prob. 2RACCh. 9 - Prob. 3RACCh. 9 - Each myofibril Is made up of many muscle fibers....Ch. 9 - Prob. 5RACCh. 9 - Which of these statements about the molecular...Ch. 9 - Prob. 7RACCh. 9 - Prob. 8RACCh. 9 - Prob. 9RACCh. 9 - Prob. 10RACCh. 9 - Prob. 11RACCh. 9 - Prob. 12RACCh. 9 - Prob. 13RACCh. 9 - With stimuli of increasing strength, which of...Ch. 9 - Considering the force of contraction of a skeletal...Ch. 9 - Which of these events occurs during the lag...Ch. 9 - Prob. 17RACCh. 9 - Prob. 18RACCh. 9 - Given the conditions: (1) low ATP levels (2)...Ch. 9 - Prob. 20RACCh. 9 - Prob. 21RACCh. 9 - Prob. 22RACCh. 9 - Prob. 23RACCh. 9 - Prob. 24RACCh. 9 - Which of these statements concerning aging and...Ch. 9 - Prob. 1CTCh. 9 - A patient is thought to be suffering from either...Ch. 9 - Design an experiment to test the following...Ch. 9 - Explain what is happening at the level of...Ch. 9 - Predict the shape of an active tension curve for...Ch. 9 - Prob. 6CTCh. 9 - Prob. 7CTCh. 9 - Prob. 8CTCh. 9 - Prob. 9CTCh. 9 - Prob. 10CTCh. 9 - Prob. 11CTCh. 9 - Prob. 12CT
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
- 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.arrow_forwardMark the following statements as true or false. If a statement is false, correct it to make a true statement. a. Muscle fibers generate more tension if the starting length of their sarcomeres is very short. b. Stimulation by a motor neuron before a muscle fiber has fully relaxed results in a condition called wave summation. c. Muscles that require a great deal of precise control will have large motor units. d. A muscle fiber changes length during isotonic concentric and isotonic eccentric contractionsarrow_forwardThe action potential of skeletal muscle A. is not essential for contraction. B. is longer than the action potential of cardiac muscle. C. has a prolonged plateau phase. D. causes the immediate uptake of calcium ions into the lateral sacs of the sarcoplasmic reticulum. E. spreads inward to all parts of the muscle via the T tubules.arrow_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_forwardWhich of the following statements are true of the neuromuscular junction? (Read carefully and select all the correct statements.) A. A synapse is the space between two muscle fibers. B. Acetylcholine is released from vesicles in the sarcolemma. C. The axon terminal is the end of a sensory neuron. D. Acetylcholine makes the sarcolemma more permeable to calcium ions. E. Cholinesterase is an enzyme that destroys acetylcholine so that the impulse will continue at the same strength. F. The receptors for acetylcholine are in the sarcolemma.arrow_forwardWhy is the latent period longer during an isotonic twitch of a skeletalmuscle fiber than it is during an isometric twitch?a. Excitation–contraction coupling is slower during an isotonic twitch.b. Action potentials propagate more slowly when the fiber is shortening,so extra time is required to activate the entire fiber.c. In addition to the time for excitation-contraction coupling, it takesextra time for enough cross-bridges to attach to make the tension in themuscle fiber greater than the load.d. Fatigue sets in much more quickly during isotonic contractions, andwhen muscles are fatigued the cross-bridges move much more slowly.e. The latent period is longer because isotonic twitches only occur in slow(type I) muscle fibers.arrow_forward
- Which of these statements concerning aging and skeletal muscle iscorrect?a. A loss of muscle fibers occurs with aging.b. Slow-twitch muscle fibers decrease in number faster than fast-twitchmuscle fibers.c. The loss of strength and speed is due mainly to loss of neuromuscular junctions.d. The density of capillaries in skeletal muscle increases.e. The number of motor neurons remains constant.arrow_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_forwardWhen 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_forward
- Which of the following could prevent skeletal muscle from contracting? Select one or more: a. Preventing calcium from surrounding myofibrils. b. Maintaining high levels of calcium around myofibrils c. Preventing sodium from entering a cell d. Allowing constant entry of sodium into a cellarrow_forwardWhich of the following is true? A. Muscle fibers either will contract with all the force possible under existing conditions or will not contract at all. B. Skeletal muscles can contract with varying degrees of strength given different circumstances. C. Muscle length does not have an effect on contractile strength. D. Metabolic condition of the myocyte does not have an effect on contractile strength.arrow_forwardWhat role (function) does calcium have within a muscle fiber? a. trigger muscle potentials along t-tubules b. trigger contraction by causing the formation of cross bridges c. trigger exocytosis of ACh across the synaptic space d. trigger action potentials along axons e. open voltage gates within the sarcoplasmic reticulum 2. Which of the following are regulatory proteins that allow a muscle fiber to contract when calcium is present? (select all that apply) dystrophin troponin myosin tropomyosin actin 3. During this phase of an action potential, potassium ions exit the cell through voltage gated potassium channels. a. depolarization b. repolarization c. glycolysis d. cross bridge formationarrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Human Biology (MindTap Course List)BiologyISBN:9781305112100Author:Cecie Starr, Beverly McMillanPublisher:Cengage Learning
Human Physiology: From Cells to Systems (MindTap ...BiologyISBN:9781285866932Author:Lauralee SherwoodPublisher:Cengage Learning
Comprehensive Medical Assisting: Administrative a...NursingISBN:9781305964792Author:Wilburta Q. Lindh, Carol D. Tamparo, Barbara M. Dahl, Julie Morris, Cindy CorreaPublisher:Cengage Learning
Human Biology (MindTap Course List)
Biology
ISBN:9781305112100
Author:Cecie Starr, Beverly McMillan
Publisher:Cengage Learning
Human Physiology: From Cells to Systems (MindTap ...
Biology
ISBN:9781285866932
Author:Lauralee Sherwood
Publisher:Cengage Learning
Comprehensive Medical Assisting: Administrative a...
Nursing
ISBN:9781305964792
Author:Wilburta Q. Lindh, Carol D. Tamparo, Barbara M. Dahl, Julie Morris, Cindy Correa
Publisher:Cengage Learning
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