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 27RQ
Which of the following statements describes smooth muscle cells?
- They are resistant to fatigue.
- They have a rapid onset of contractions.
- They cannot exhibit tetanus.
- They primarily use anaerobic
metabolism .
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Which of the following statements regarding skeletal muscle is NOT true?
Skeletal muscle is responsible for overall body motility.
Skeletal muscle can contract rapidly and can maintain the contraction for long periods of activity
.Skeletal muscle can exert tremendous power.
Skeletal muscle is called voluntary muscle because it is the only type subject to conscious control.
Which of the following correctly states the importance of an action potential to muscle contration?
The SR will only release Ca2+ if it has been electrically stimulated.
Sarcomeres require a negative electrical charge to start sliding.
Actin and myosin must be electrically charged to create a cross-bridge.
ATP cannot be split into ADP and Pi without an action potential.
Which of the following is NOT correct regarding muscle contraction?
O Ca++ in the sarcoplasm returns to the nucleus to be stored
ATP needs to be present for muscle relaxation
A neurotransmitter is released at the neuromuscular junction
ATP needs to be present for muscle contraction
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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- Skeletal muscle contraction requires _________. a. calcium ions b. ATP c. arrival of a nerve impulse d. all of the abovearrow_forwardWhy do you think a person is able to perform anaerobic exercise (such as lifting and holding a heavy weight) only briefly but can sustain aerobic exercise (such as walking or swimming) for long periods? (Hint: Muscles have limited energy stores.)arrow_forwardWhich of the following muscle types and characteristic is correctly matched? Smooth muscle : Ca-calmodulin regulation of myosin light chain kinase Cardiac muscle : calcium only from the sarcoplasmic reticulum Cardiac muscle : dense body anchoring proteins Skeletal muscle : varicosity at neuromuscular junctionsarrow_forward
- Which of the following happens within the sarcomere during muscle contraction? The myosin filaments "walk" along the actin filaments bidirectionally towards the Z lines. The myosin filaments shorten. The actin filaments shorten. The H bands and I bands both increase in width.arrow_forwardWhich of the following is associated with smooth muscle contraction? Troponin as calcium-sensing protein. Contraction based on the sliding filaments theory. Calcium-induced calcium release mechanism. Electromechanical calcium release mechanism. Contraction requires myosin light-chain kinase activityarrow_forwardSkeletal muscle will be released in its contracted (rigor) state when: Group of answer choices ATP is hydrolyzed into forming ADP and inorganic phosphate. ATP binds to the myosin head. ADP is dissociated from the myosin head. ATP binds to the actin G-molecule.arrow_forward
- Which of the following are aspects of the structure of skeletal muscle? Select all that apply. The muscle fibers are parallel to one another and have a striated appearance. They have more mitochondria than other types of muscle cells. Each fiber contains many units of contraction and protein filaments. Cells are branched or unbranched with single nuclei. It consists of cylindrical cells called muscle fibers that have multiple nuclei.arrow_forwardWhich of the following is NOT true of fast oxidative skeletal muscle fibers? O All of the above describe fast oxidative muscle fibers There muscle fibers are surrounded by a high number of capillaries There muscle fibers contain many mitochondria There fibers can be converted to slow oxidative fibers during periods of no training There is a high myoglobin content in these types of fibersarrow_forwardWhich of the following is FALSE regarding muscle cell metabolism? Creatine phosphate can make ATP Lactic acid production helps regenerate pyruvate Glucose can be broken down to make ATP Muscles can store oxygen All of the above are truearrow_forward
- Which of the following step(s) about the excitation of skeletal muscle is/are incorrect? 1. Acetylcholine is released and binds to motor end plate receptors 2. An action potential is created and moves down T-tubules 3. Calcium is released from the sarcoplasmic reticulum 4. Calcium ions bind to tropomyosin to shift troponin off the binding sites for cross-bridging 5. Myosin forms cross-bridges and binds with actin to pull it towards middle of sarcomerearrow_forwardWhich of the following statements is true regarding muscle contraction? When a muuscle contracts, the sarcomere remains the same size. When a muscle contracts, the H-zone becomes narrower (shortens). When a muscle contracts, the lighter I-band becomes wider. When a muscle contracts, the A-band shortens.arrow_forwardWhich of the following features is common to Type 1 muscle fibers but not Type 2 muscle fibers? fast and powerful contraction has large blood supply and many mitochondria relies mostly on anaerobic respiration to generate ATP has low amounts of myoglobinarrow_forward
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