Human Physiology: An Integrated Approach (8th Edition)
8th Edition
ISBN: 9780134605197
Author: Dee Unglaub Silverthorn
Publisher: PEARSON
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Chapter 13.3, Problem 6CC
Summary Introduction
To determine: The neurons that are active in biceps muscle when a person picks up a weight.
Introduction: Reflexes are described as the involuntary movements in response to a specific stimulus. Skeletal muscle reflexes have different components such as sensory receptor, somatic motor neurons, and others.
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We move a lot and do not even realize how intricate these movements may be from gross motor to fine motor manipulations. Briefly explain the steps involved in a single muscle contraction beginning at the neuromuscular junction through one complete contraction and relaxation for the sliding filament theory. Don’t forget to include all the major proteins (actin, myosin, troponin and tropomyosin) involved as well as calcium and ATP.
Chapter 13 Solutions
Human Physiology: An Integrated Approach (8th Edition)
Ch. 13.2 - List the general steps of a reflex pathway,...Ch. 13.2 - If a cell hyperpolarizes, does its membrane...Ch. 13.3 - Prob. 3CCCh. 13.3 - Draw a reflex map of the flexion reflex initiated...Ch. 13.3 - Prob. 5CCCh. 13.3 - Prob. 6CCCh. 13.3 - Prob. 7CCCh. 13 - Prob. 1RQCh. 13 - Prob. 2RQCh. 13 - The pathway pattern that brings information from...
Ch. 13 - When the axon terminal of a modulatory neuron...Ch. 13 - Autonomic reflexes are also called _____ reflexes....Ch. 13 - Prob. 6RQCh. 13 - Prob. 7RQCh. 13 - Prob. 8RQCh. 13 - Prob. 9RQCh. 13 - Prob. 10RQCh. 13 - Prob. 11RQCh. 13 - Prob. 12RQCh. 13 - Prob. 13RQCh. 13 - Prob. 14RQCh. 13 - Prob. 15RQCh. 13 - Prob. 16RQCh. 13 - Prob. 17RQCh. 13 - At your last physical, your physician checked your...Ch. 13 - There are several theories about how presynaptic...Ch. 13 - Prob. 20RQCh. 13 - Prob. 21RQCh. 13 - Prob. 22RQ
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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_forwardIn the diagram below, label the fine structure of a muscle, down to one of its myofibrils. Identify the basic unit of contraction in a myofibril.arrow_forwardSkeletal muscle contraction requires _________. a. calcium ions b. ATP c. arrival of a nerve impulse d. all of the abovearrow_forward
- Put the following statements describing the skeletal muscle contration pathway in the correct order action potential enters the transverse- tubule action potential generated at motor end plate action potential travel across sarcolemma sarcoplasmic reticulum releases calciumarrow_forwardWhich of the following statements regarding summation in skeletal muscle fibers is true? Incomplete tetanus allows complete relaxation between stimulation of successive twitches Complete tetanus does not have any relaxation between stimulation of successive twitches All of these are correct The development of force in a muscle twitch is all or nonearrow_forwardA motor unit consists of: Lower Motor Neuron cell body Axons O Muscle fibres All of the abovearrow_forward
- The relaxation of skeletal muscle relies on the activity of the _ which decreases cytoplasmic calcium ion concentration. acetylcholine receptor Ca2+ -ATPase pump ryanodine receptor Na*/K* ATPase pumparrow_forwardSkeletal muscle is described as striated. What are the lighter, thinner stripes noted under the microscope? Group of answer choices troponin actin myosin dystrophin Rather than innervating individual muscle fibers, motor neurons often innervate two or more muscle fibers. The motor neuron and the muscle fibers it innervates are together called a: Group of answer choices motor unit myofibril muscle fascicle motor fascia Fast glycolytic muscle fibers allow for relatively quick ATP energy production by splitting glucose (but eventually leads to fatigue), a process described as: Group of answer choices fermentation aerobic pathway anaerobic pathway ATP reserve usearrow_forwardInterruption of spindle discharge from a muscle causes contraction of the muscle to become jerky and irregular due to :-a- increased activity of reverberating circuits causing fluctuation of the motor discharge to the muscleb- increased activity of inhibitory interneurons causing oscillating inhibition of the α-motor neurons of the musclec- irregular discharge of excitatory inputs to the α-motor neurons of the muscle d- post-tetanic potentiation of the α-motor neurons of the musclearrow_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_forwardThe motor end plate is extensively folded to allow for greater number of what structure? Terminal cisternae Transverse tubules Cholinergic receptors Myofibrilsarrow_forwardWhich of the following are correct regarding processes that are involved in the Latent period of a muscle twitch? (choose all that apply) Acetylcholine binds to nicotinic receptors on the motor-end-plate Myosin binds with Actin forming the "cross-bridge" Power-Stroke Cycling is occurring Action potential travels down T-Tubules O Calcium is released from Terminal Cisternae and binds to Troponinarrow_forward
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The Sensorimotor System and Human Reflexes; Author: Professor Dave Explains;https://www.youtube.com/watch?v=M0PEXquyhA4;License: Standard youtube license