New Masteringbiology With Pearson Etext -- Valuepack Access Card -- For Campbell Biology: Concepts & Connections
8th Edition
ISBN: 9780321946591
Author: Reece, Jane B., Taylor, Martha R., SIMON, Eric J., DICKEY, Jean L., Hogan, Kelly A.
Publisher: PEARSON
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Chapter 30, Problem 16TYK
Drugs are often used to relax muscles during surgery. Which of the following chemicals do you think would make a better muscle relaxant, and why? Chemical A: Blocks acetylcholine receptors on muscle cells. Chemical B: Floods the cytoplasm of muscle cells with calcium ions.
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Pick 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 actin
Of the below, could you please assist with what applies to Muscle tone?
is a condition in which the muscle fiber only partially relaxes between contractions.
is a constant tension produced by muscles for long periods of time.
is a time during which the tissue cannot respond again.
results in complete and incomplete tetanus.
is a condition in which stimuli occur so rapidly that there are no intervening relaxations.
Which of the following changes takes place when a skeletal muscle contracts?A. Z discs move farther apart.B. Actin filaments contract.C. Myosin filaments contract.D. Sarcomeres become shorter.
Chapter 30 Solutions
New Masteringbiology With Pearson Etext -- Valuepack Access Card -- For Campbell Biology: Concepts & Connections
Ch. 30 - Complete this concept map on animal movement.Ch. 30 - A humans internal organs are protected mainly by...Ch. 30 - Arm muscles and leg muscles are arranged in...Ch. 30 - Gravity would have the least effect on the...Ch. 30 - Prob. 5TYKCh. 30 - Prob. 6TYKCh. 30 - When a dog is running fast, its body position is...Ch. 30 - What is the role of calcium in muscle contraction?...Ch. 30 - Muscle A and muscle B have the same number of...Ch. 30 - Prob. 10TYK
Ch. 30 - Prob. 11TYKCh. 30 - Prob. 12TYKCh. 30 - Prob. 13TYKCh. 30 - Describe how you bend your arm, starting with...Ch. 30 - Prob. 15TYKCh. 30 - Drugs are often used to relax muscles during...Ch. 30 - An earthworms body consists of a number of...Ch. 30 - When a person dies, muscles become rigid and fixed...Ch. 30 - SCIENTIFIC THINKING Imagine you have a friend who...
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- Figure 38.37 Which of the following statements about muscle contraction is true? The power stroke occurs when ATP is hydrolyzed to ADP and phosphate. The power stroke occurs when ADP and phosphate dissociate from the myosin head. The power stroke occurs when ADP and phosphate dissociate from the actin active site. The power stroke occurs when Ca2+ binds the calcium head.arrow_forwardWhich component is responsible for initially stimulating a muscle contraction? a. proteins b. electrochemical signals c. plasma membranes d. striationsarrow_forwardA skeletal muscle motor unit A.Is the number of muscle cells innervated by one motor neuron. B.Is the number of motor neurons innervating one muscle cell. C.Size determines the ability to control a muscle D.Size determines how much a muscle contracts at any one time.arrow_forward
- The neurotransmitter that initiates events leading to skeletal muscle contraction is A. creatine kinase. B. creatinine. C. norepinephrine. D. acetylcholinearrow_forwardWhich of the following statements about skeletal muscle is CORRECT? Select one: a. An increase in Na+ concentration in the cytosol starts muscle filament sliding. b. The muscle is non-striated and involuntary. c. The muscle is involved in shivering thermogenesis. d. The muscle contracts in response to parasympathetic stimulation. e. The muscle contracts in response to hormones.arrow_forwardWhich of the following causes ( the state of ) rigor in skeletal muscle ?a) lack of atp b) decrease of intracellular ca2plus c) increase in intracellular ca2+ d) lack of action potential in motor neuronsarrow_forward
- Which of the following choices best summarizes excitation-contraction coupling? A series of events in which an action potential triggers the release of chemical messengers A series of events in which actin binds myosin to enact contraction A series of events in which an electrical stimulus is conveyed to a muscle fiber to enact contraction A series of events in which calcium gradients are used to convey a signal to the muscle fiber to enact contractionarrow_forwardWhich of the following does NOT occur in or immediately prior to a muscle contraction? action potential in motor neuron acetylcholine released into synaptic cleft temporary localized changes in the membrane potential of the sarcolemma and t-tubules sacroplasmic recticulum releases acetylcholine active sites on actin molecules are exposed During contraction of a muscle, calcium ions bind to the _______." actin and myosin filaments troponin molecule tropomyosin molecule sarcoplasmic reticulum sarcolemma Which of the following is NOT a role of ionic calcium in muscle contraction? triggers neurotransmitter secretion binds with troponin removes contraction inhibitor spreads the depolarization from the neuromuscular junction to the T-tubules The role of tropomyosin in a muscle cell is to ____. all to cell to relax by blocking the binding sites on actin facilitate the formation of cross-bridges between actin and myosin Interactions between thick and thin filaments during muscle…arrow_forwardThe following are the basic steps of a muscle contraction: I. Neurotransmitters bind to receptors II. Myosin pulls on actin III. Ca2+ binds to troponin IV. Myosin binds to actin V. Myosin releases actin VI. Ca2+ is released/unbound Which of the following puts the steps above in the correct order?arrow_forward
- Which 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_forwardThe type of muscle cell under voluntary control is the ________. a. smooth muscle b. skeletal muscle c. cardiac muscle d. visceral musclearrow_forwardThe higher the frequency of action potentials, the higher amount of force produced in a muscle. true or falsearrow_forward
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