ANATOMY PHYS VOL II W ACCESS CUSTOM
9th Edition
ISBN: 9781264412303
Author: SALADIN
Publisher: MCG CUSTOM
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Question
Chapter 11.3, Problem 8BYGO
Summary Introduction
To analyze:
The difference between a motor unit of more muscular strength than fine control and another motor unit of more fine control.
Introduction:
Skeletal muscles are provided with many nerve cells. These nerve cells are known as somatic motor neurons. Their cell bodies can be found within the spinal cord and the brainstem. The axons of these nerve cells are called somatic motor fibers. They proceed to muscles.
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Students have asked these similar questions
What differences would you expect to see between amotor unit where muscular strength is more important thanfine control and another motor unit where fine control ismore important?
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.
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 sarcomere
Chapter 11 Solutions
ANATOMY PHYS VOL II W ACCESS CUSTOM
Ch. 11.1 - Prob. 1BYGOCh. 11.1 - Prob. 2BYGOCh. 11.1 - Prob. 3BYGOCh. 11.1 - Five physiological properties of all muscular...Ch. 11.1 - Prob. 2AYLOCh. 11.1 - Prob. 3AYLOCh. 11.1 - Prob. 4AYLOCh. 11.2 - Prob. 4BYGOCh. 11.2 - Prob. 5BYGOCh. 11.2 - Prob. 6BYGO
Ch. 11.2 - Prob. 7BYGOCh. 11.2 - Prob. 1AYLOCh. 11.2 - Prob. 2AYLOCh. 11.2 - Prob. 3AYLOCh. 11.2 - Prob. 4AYLOCh. 11.2 - Prob. 5AYLOCh. 11.2 - Prob. 6AYLOCh. 11.2 - Prob. 7AYLOCh. 11.2 - Prob. 8AYLOCh. 11.2 - Prob. 9AYLOCh. 11.2 - Prob. 10AYLOCh. 11.3 - Prob. 8BYGOCh. 11.3 - Prob. 9BYGOCh. 11.3 - Prob. 10BYGOCh. 11.3 - Prob. 11BYGOCh. 11.3 - Prob. 12BYGOCh. 11.3 - Motor units; the meanings of large and small motor...Ch. 11.3 - Prob. 2AYLOCh. 11.3 - Prob. 3AYLOCh. 11.3 - Prob. 4AYLOCh. 11.3 - Prob. 5AYLOCh. 11.3 - How an action potential differs from the RMP, and...Ch. 11.4 - Prob. 13BYGOCh. 11.4 - Prob. 14BYGOCh. 11.4 - Prob. 15BYGOCh. 11.4 - Prob. 16BYGOCh. 11.4 - Prob. 1AYLOCh. 11.4 - Prob. 2AYLOCh. 11.4 - Prob. 3AYLOCh. 11.4 - Muscle relaxation; how the cessation of the nerve...Ch. 11.4 - Prob. 5AYLOCh. 11.4 - Prob. 6AYLOCh. 11.5 - Prob. 17BYGOCh. 11.5 - Prob. 18BYGOCh. 11.5 - Prob. 19BYGOCh. 11.5 - Prob. 20BYGOCh. 11.5 - Prob. 1AYLOCh. 11.5 - The phases of a muscle twitchCh. 11.5 - Prob. 3AYLOCh. 11.5 - How recruitment and tetanus are produced and how...Ch. 11.5 - Prob. 5AYLOCh. 11.6 - Prob. 21BYGOCh. 11.6 - Prob. 22BYGOCh. 11.6 - Prob. 23BYGOCh. 11.6 - Prob. 24BYGOCh. 11.6 - Prob. 25BYGOCh. 11.6 - Prob. 1AYLOCh. 11.6 - Prob. 2AYLOCh. 11.6 - The use of myoglobin and aerobic respiration to...Ch. 11.6 - Prob. 4AYLOCh. 11.6 - How anaerobic fermentation generates ATP after the...Ch. 11.6 - Why a muscle is able to switch back to aerobic...Ch. 11.6 - Prob. 7AYLOCh. 11.6 - Vo2max, it partially determines ones ability to...Ch. 11.6 - Prob. 9AYLOCh. 11.6 - Differences between slow oxidative and fast...Ch. 11.6 - Prob. 11AYLOCh. 11.6 - Examples of resistance exercise and endurance...Ch. 11.7 - Prob. 26BYGOCh. 11.7 - Prob. 27BYGOCh. 11.7 - Prob. 28BYGOCh. 11.7 - Prob. 29BYGOCh. 11.7 - Prob. 30BYGOCh. 11.7 - Prob. 1AYLOCh. 11.7 - Structural differences between cardiomyocytes and...Ch. 11.7 - Prob. 3AYLOCh. 11.7 - Prob. 4AYLOCh. 11.7 - Prob. 5AYLOCh. 11.7 - Prob. 6AYLOCh. 11.7 - Prob. 7AYLOCh. 11.7 - Prob. 8AYLOCh. 11.7 - Prob. 9AYLOCh. 11.7 - Prob. 10AYLOCh. 11.7 - Prob. 11AYLOCh. 11.7 - Prob. 12AYLOCh. 11.7 - Prob. 13AYLOCh. 11.7 - Prob. 14AYLOCh. 11.7 - The role of smooth muscle in peristalsisCh. 11.7 - Prob. 16AYLOCh. 11 - Prob. 1TYRCh. 11 - Prob. 2TYRCh. 11 - Prob. 3TYRCh. 11 - Prob. 4TYRCh. 11 - Prob. 5TYRCh. 11 - Prob. 6TYRCh. 11 - ACh receptors are found mainly in a. synaptic...Ch. 11 - Prob. 8TYRCh. 11 - Prob. 9TYRCh. 11 - Slow oxidative fibers have all of the following...Ch. 11 - Prob. 11TYRCh. 11 - Prob. 12TYRCh. 11 - Parts of the sarcoplasmic reticulum called ______...Ch. 11 - Prob. 14TYRCh. 11 - Prob. 15TYRCh. 11 - Prob. 16TYRCh. 11 - Prob. 17TYRCh. 11 - Prob. 18TYRCh. 11 - A state of continual partial muscle contraction is...Ch. 11 - Prob. 20TYRCh. 11 - Prob. 1BYMVCh. 11 - Prob. 2BYMVCh. 11 - dys-Ch. 11 - iso-Ch. 11 - Prob. 5BYMVCh. 11 - Prob. 6BYMVCh. 11 - Prob. 7BYMVCh. 11 - temporo-Ch. 11 - Prob. 9BYMVCh. 11 - Prob. 10BYMVCh. 11 - Prob. 1WWTSCh. 11 - Prob. 2WWTSCh. 11 - Prob. 3WWTSCh. 11 - Prob. 4WWTSCh. 11 - Thin filaments shorten when a muscle contracts.Ch. 11 - Smooth muscle lacks striations because it does not...Ch. 11 - Prob. 7WWTSCh. 11 - Prob. 8WWTSCh. 11 - Prob. 9WWTSCh. 11 - Prob. 10WWTSCh. 11 - Prob. 1TYCCh. 11 - Prob. 2TYCCh. 11 - Why would skeletal muscle be unsuitable for the...Ch. 11 - As skeletal muscle contracts, one or more bands of...Ch. 11 - Prob. 5TYC
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Similar questions
- In a general sense, how do skeletal muscles produce movement?arrow_forwardDescribe how each of the following factors influences motor unit recruitment: a) Increasing contraction speed b) Increasing force output c) Increasing fatiguearrow_forwardA motor unit associated with the stimulation of skeletal muscle is designated as a 1:8 motor unit. Which of the following statements is correct? The motor unit consists of one somatic neuron and 8 myofibers (muscle fibers) Each of the myofibers in the motor unit is innervated by more than one neuron It is part of the autonomic nervous system The neuron in the motor unit is an afferent neuronarrow_forward
- Which of the following is not true when comparing slow twitch red and fast twitch white muscle fibers? Question 2 options: a) Red contain more mitochondria than white b) Red contain more myoglobin than white c) Red contracts more slowly than white d) Red contain more glycogen stores than whitearrow_forwardTo demonstrate muscle fatigue, a student held an 8 lb dumbbell in her hand and abducted her arm parallel to the floor. After 45 seconds, she has having difficulty holding that position so she rotated her hand 90 degrees. This allowed her to hold the dumbbell in position for an additional 20 seconds. Which of the following is the best explanation for this? A. Different motor units were contracting while others were relaxing. B. Muscles began to contract isotonically rather than isometrically. C. The load was reduced. D. The resistance to contraction was reduced. E. The change in position provided a greater range of motion at the shoulder.arrow_forwardIndicate which of the following are true. Chronically shortened muscles will lose sarcomeres in series in order to maintain ideal amounts of myofilament overlap. Contractile force is proportional to the length of a muscle. Muscle organ contraction is all or nothing. Muscle cells are surrounded by an endomysium. Actin is the thick filament and Z-lines are where the cross-bridges zig-zag to adjacent actin filaments. Muscles with fewer motor units are weaker, i.e., capable of less force. A nerve impulse, calcium, and ATP are necessary for muscle contraction. Tendons attach bones to bones and help to limit the range of motion at joints. Muscle tissue is very dynamic and will respond to chronic stress by becoming stronger (making more myofilaments), chronic contraction by becoming shorter (losing sarcomeres in series), and stretching by becoming longer (adding sarcomeres in series). Myofilaments are actually long strands of proteins.arrow_forward
- You are at the gym and doing strength training. You feel in good shape and should try to break personal records in squats. You place the bar on your back and begin to take in, that is, your motor neurons begin to send action potentials through all your motor units to the thigh muscles. What is the contraction called when you a) bend down and b) are in good shape and can generate more force than the bar weighs c) stay standing in one and the same position without being able to push yourself up in a standing position?arrow_forwardWhich one of the following statements is the best description of a motor unit? A single α-motor neuron with all of the muscle fibres it connects to. The activity in a single muscle fibre. The activity in a single muscle. A single action potential conducted along a motor axon.arrow_forwardYou are at the gym and doing strength training. You feel in good shape and decided to try to break your personal records in squats. You place the bar on your back and begin to push down, that is, your motor neurons that begins to send action potentials through all your motor units to the quad muscles. 1. What is the contraction called when you a) bend down b) are in good shape and can generate more force than what the bar weighs c) stay standing in one and the same position without being able to push yourself up while standing?arrow_forward
- Isometric exercise is best described as applying a force O a) with movement through a full and complete range of motion O b) while a muscle is lengthening and returning to a resting position c) without any change in length of the muscle O d) at a constant speedarrow_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_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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