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 16RQ
Muscle fatigue is caused by ________.
- buildup of ATP and Lactic acid levels
- exhaustion of energy reserves and buildup of lactic acid levels
- buildup of ATP and pyruvic acid levels
- exhaustion of energy reserves and buildup of pyruvic acid levels
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Graded muscle contractions ________.
depend on activation of more and more motor units
depend on increasing frequency of nerve action potentials to each motor unit
represent increasing amounts of force generated by a muscle
all of the above
Smooth muscle is characterized by all of the following except _______.
Group of answer choices
has caveolae to sequester extracellular calcium
is usually in two layers circular and longitudinal to contract and relax hollow organs
there are noncontractile intermediate filaments that attach to dense bodies within the cell
neuromuscular junction
has no sarcomeres or T-tubules
The rising phase of a muscle twitch represents ________.
the time of relaxation of the muscle fibers
the time between stimulus and active muscle contraction
the time of shortening of the sarcomeres of the muscle fibers
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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Similar questions
- In the absence of _____, a contracted skeletal muscle will not relax but will develop rigor mortis calcium magnesium adenosine diphosphate adenosine triphosphate glucosearrow_forwardFast twitch muscle fibers have lower force production than slow twitch. True Falsearrow_forwardIn an isometric contraction, the muscle ________." shortens without a load does not change in length but increases tension is not stimulated by a motor neuron is unable form cross-bridges and fails to develop tension Which method of regenerating ATP is used in a very short duration activity, such as a 100m sprint, because it is the most rapid method of regenerating ATP?" aerobic respiration in the mitochondria glycolysis in the mitochondria anaerobic respiration in the cytoplasm (or cytosol) breaking a phosphate bond on phosphocreatine The metabolic pathway that results in the production of two net ATPs per glucose plus two pyruvic acid molecules ________. only occurs within the mitochodria is called glycolysis only occurs when there is no oxygen present is the main method of generating ATP for maximum effort activities that last 1-2 Where does overÊ95% of a skeletal muscle cell's energyÊcome from during both rest andÊmoderate exercise? creatine phosphate lactic acid anaerobic…arrow_forward
- Smooth muscle has spindle-shaped cells that have only one spiral nucleus and the tissue is not striated. True Falsearrow_forwardSkeletal muscle fibers regularly divide by mitosis. True Falsearrow_forwardThe correct order for the smallest to the largest unit of organization in muscle tissue is ________. fascicle, filament, muscle fiber, myofibril filament, myofibril, muscle fiber, fascicle muscle fiber, fascicle, filament, myofibril myofibril, muscle fiber, filament, fasciclearrow_forward
- A skeletal muscle can often maintain a moderate level of active tension for long periods of time, even though many of its fibers become fatigued Explain.arrow_forwardWeight training causes fast glycolytic fibers to hypertrophy (increase in diameter). Explain why this increases strength.arrow_forwardPart B - Electrical and Chemical Events of Muscle Contraction Match the type of articulation with the best description of either its functionality or arrangement of tissue. > View Available Hint(s) Reset Help Motor unit Also known as an 1Cimpulse, 1D a(n) is an electrical signal that is produced on Neurotransmitters excitable membrane such as muscle and nerve tissue. All-or-none principle are chemicals released at the synaptic terminal of a neuron that can transmit an Muscle fatigue Sm impulse to a muscle fiber. Action potential A muscle fiber is either contracted or it's not. This is the Recruitment A runner competing in the 50-yard dash has muscles in the legs that are undergoing Complete tetanus is described as àll the muscle fibers controlled by the same motor neuron. is the process by which a muscle produces more force to pick up a brick verses a feather. You are at the finish line of the Boston Marathon and see a runner fall a few yards from the finish line. This runner is…arrow_forward
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