Anatomy & Physiology
1st Edition
ISBN: 9781938168130
Author: Kelly A. Young, James A. Wise, Peter DeSaix, Dean H. Kruse, Brandon Poe, Eddie Johnson, Jody E. Johnson, Oksana Korol, J. Gordon Betts, Mark Womble
Publisher: OpenStax College
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Textbook Question
Chapter 10, Problem 24RQ
Cardiac muscles differ from skeletal muscles in that they ________.
- are striated
- utilize aerobic
metabolism - contain myofibrils
- contain intercalated discs
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Cardiac muscles differ from skeletal muscles in thatthey ________.a. are striatedb. utilize aerobic metabolism
c. contain myofibrilsd. contain intercalated discs
Striations, cylindrical cells, and multiple nuclei areobserved in ________.a. skeletal muscle onlyb. cardiac muscle onlyc. smooth muscle onlyd. skeletal and cardiac muscles
Which of the following properties is not common to allthree muscle tissues?a. excitabilityb. the need for ATPc. at rest, uses shielding proteins to cover actinbindingsitesd. elasticity
Chapter 10 Solutions
Anatomy & Physiology
Ch. 10 - Watch this video...Ch. 10 - Every skeletal muscle fiber is supplied by a motor...Ch. 10 - The release of calcium ions initiates muscle...Ch. 10 - Muscle that has a striped appearance is described...Ch. 10 - Which element is important in directly Triggering...Ch. 10 - Which of the following properties is not common to...Ch. 10 - The correct order for the smallest to the largest...Ch. 10 - Depolarization of the sarcolemma means ________....Ch. 10 - In relaxed muscle, the myosin-binding site on...Ch. 10 - According to the sliding filament model, binding...
Ch. 10 - The cell membrane of a muscle fiber is called...Ch. 10 - Muscle relaxation occurs when ________. calcium...Ch. 10 - During muscle contraction, the cross-bridge...Ch. 10 - Thin and thick filaments are organized into...Ch. 10 - During which phase of a twitch in a muscle fiber...Ch. 10 - Muscle fatigue is caused by ________. buildup of...Ch. 10 - A sprinter would experience muscle fatigue sooner...Ch. 10 - What aspect of creatine phosphate allows it to...Ch. 10 - Dmg X blocks ATP regeneration from ADP and...Ch. 10 - The muscles of a professional sprinter are most...Ch. 10 - The muscles of a professional marathon runner are...Ch. 10 - Which of the following statements is true? Fast...Ch. 10 - Which of the following statements is false? Slow...Ch. 10 - Cardiac muscles differ from skeletal muscles in...Ch. 10 - If cardiac muscle cells were prevented from...Ch. 10 - Smooth muscles differ from skeletal and cardiac...Ch. 10 - Which of the following statements describes smooth...Ch. 10 - From which embryonic cell type does muscle tissue...Ch. 10 - Which cell type helps to repair injured muscle...Ch. 10 - Why is elasticity an important quality of muscle...Ch. 10 - What would happen to skeletal muscle if the...Ch. 10 - Describe how tendons facilitate body movement.Ch. 10 - What are the five primary functions of skeletal...Ch. 10 - What are the opposite roles of voltage-gated...Ch. 10 - How would muscle contractions be affected if...Ch. 10 - What causes the striated appearance of skeletal...Ch. 10 - How would muscle contractions be affected if ATP...Ch. 10 - Why does a motor unit of the eye have few muscle...Ch. 10 - What factors contribute to the amount of tension...Ch. 10 - Why do muscle cells use creatine phosphate instead...Ch. 10 - Is aerobic respiration more or less efficient than...Ch. 10 - What changes occur at the cellular level in...Ch. 10 - What changes occur at the cellular level in...Ch. 10 - What would be the drawback of cardiac contractions...Ch. 10 - How are cardiac muscle cells similar to and...Ch. 10 - Why can smooth muscles conn act over a wider range...Ch. 10 - Describe the differences between single-unit...Ch. 10 - Why is muscle that has sustained significant...Ch. 10 - Which muscle type(s) (skeletal, smooth, or...
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- After death, a person no longer makes ATP, so calcium stored in the sarcoplasmic reticulum diffuses down its concentration gradient into the muscle cytoplasm. This result is rigor mortis----an unbreakable state of muscle contraction that stiffens the body for a few days until muscles begin to decay. Explain why this contraction occurs.arrow_forward______ muscle pulls on bones and _______ muscle regulates the diameter of blood vessels. a. Skeletal / cardiac b. Smooth / cardiac c. Skeletal / smooth d. Smooth / skeletalarrow_forwardNerve impulses first stimulate a skeletal muscle fiber at _______. a. T tubules b. sarcomeres c. neuromuscular junctions d. actin binding sitesarrow_forward
- The _____ is the basic unit of muscle contraction. a. myofibril b. sarcomere c. muscle fiber d. myosin filamentarrow_forwardSmooth muscles differ from skeletal and cardiac muscles in that they ________. lack myofibrils are under voluntary control lack myosin lack actinarrow_forwardIn a muscle, muscle fibers are arranged in bundles that are wrapped in a thick layer of connective tissue. This thick layer of connective tissue which wraps the bundles is called .... O perimysium O epimysium O endomysium O fasciaarrow_forward
- How could the nervous system cause a skeletal muscle to produce themost forceful contraction it is capable of?arrow_forwardFast-twitch muscle fibers have which of the following characteristics?a. fewer number of mitochondriab. rely on fermentation and creatine phosphate pathwaysc. are primarily anaerobicd. provide for a quick release of energye. All of these are correct.arrow_forwardMuscles are powered by: A) Bone marrowB) Electrical impulsesC) IodineD) Gravityarrow_forward
- Why 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_forwardSkeletal muscles would be expected to contain large numbers of ————— because of their high energy demands 1. Lysosomes 2.cilia 3. Mitochondria 4. Chloroplastsarrow_forwardhypoventilation builds up carbon dioxide in the body which causes respiratory acidosis. This would break down thick and thin myofilaments. Why exactly would that happen?arrow_forward
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