HUMAN ANATOMY-ACCESS
9th Edition
ISBN: 9780134562773
Author: Martini
Publisher: PEARSON
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Chapter 9, Problem 4RC
Summary Introduction
Introduction:
Muscle contraction refers to the acceleration of tension-producing points present in the muscle fibers. The contraction of muscle fiber exerts a tension that leads to shortening of the length of muscle fiber. This process requires energy in the form of ATP.
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26) muscle tone is ....
a) the ability of a muscle to efficiently cause skeletal movements
b) the feeling of well being following exercise
c) the condition of athletes after intensive training
d) a state of sustained partial contraction
Which of the following statements is unique to skeletal muscle?
O a) skeletal muscle has striations
O b) skeletal muscle is attached to bones
O c) skeletal muscle is under voluntary control
O d) skeletal muscle is multinucleated
O all of the above
O b, c, & d but not a
27) which of the following is not a property of muscle?
a) cells are non- elastic
b) cells are excitable
c) cells are contractile
d) cells are distensible
Chapter 9 Solutions
HUMAN ANATOMY-ACCESS
Ch. 9 - 1. Active sites on actin become available for...Ch. 9 - Prob. 2RFTCh. 9 - Prob. 3RFTCh. 9 - 4. Another name for a muscle that is a prime mover...Ch. 9 - Prob. 5RFTCh. 9 - Prob. 6RFTCh. 9 - 7. The theory that explains muscle contraction is...Ch. 9 - Prob. 8RFTCh. 9 - Label the illustrations to the right as...Ch. 9 - Prob. 1RC
Ch. 9 - 2. The ability to recover from injuries in older...Ch. 9 - Prob. 3RCCh. 9 - Prob. 4RCCh. 9 - Prob. 5RCCh. 9 - A motor unit from a skeletal muscle contains 1500...Ch. 9 - 7. What is the role of the zone of overlap in...Ch. 9 - Several anatomy students take up weight lifting...Ch. 9 - Prob. 2CT
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- Which of the following statements about smooth muscle is false? (a) Smooth muscle cells are called fibers. (b) Most smooth muscle cells, like cardiac muscle cells, are joined by gap junctions. (c) Smooth muscle cells have a single, centrally located nucleus. (d) Contraction of smooth muscle is stimulated exclusively by involuntary nerves. (e) Smooth muscle tissue found in the wall of hollow organs is arranged in sheets.arrow_forwardSlow twitch muscle fibers are characterized by all of the following EXCEPT: O a) used in endurance type of activities O b) contract rapidly and forcefully Oc) resistant to fatigue O d) have a direct relationship to the oxidative energy systemarrow_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
- 14) after a muscle fiber has contracted, the calcium a) is secreted by the Golgi apparatus b) is chemically bound to the myofilaments c) renters the sarcoplasmic reticulum d) is destroyedarrow_forwardAs lactic acid and other substances accumulate in an active muscle, they stimulate pain receptors, and the muscle may feel sore. How might the application of heat or substances that dilate blood vessels help relieve such soreness?arrow_forwardPlace 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_forward
- 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 , sarcomerearrow_forwardWhich is true for striated muscles? a) may have spontaneous activity b) is not under the control of the will c) many cell nuclei, located below the membrane, in each muscle fiber.arrow_forwardDuring muscular contraction, cross-bridges form between _____ and _____ . Multiple Choice a) myosin, tropomyosin b) myosin, troponin c) troponin, calmodulin d) actin, tropomyosin e) actin, myosinarrow_forward
- What type of muscle fibers would you expect to find in the leg muscles of a well-trained marathon runner? a) primarily anaerobic fibers b) myoglobin-poor fibers c) very fast fibers d) fibers with many mitochondriaarrow_forwardA muscle fiber is the same thing as a: a) myofibril. b) myocyte. c) myofilament. d) fascicle.arrow_forwardIn 2013, Zach Bitter set a new record for running a 100 mile Ultra-Marathon in less than 12 hours. (Holy smokes!!!) If we were to look at the composition of his skeletal muscles (particularly in his legs), we would likely find a greater proportion of: A)Type I Fibers b)Type IIX Fibers Creatine phosphate can supply the phosphate for conversion of ADP into ATP. The enzyme needed for this to occur is: A)creatine kinase B)creatine hydrolase C)adenylate cyclase D)adenylate phosphatasearrow_forward
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