your scantron. 1. A motor unit refers to a. a single muscle fiber plus all of the motor neurons that innervate it b. all of the motor neurons supplying a single muscle c. *a single motor neuron plus all the muscle fibers it innervates d. a pair of antagonistic muscles e. all of the muscles that affect the movement of any given joint 2. Which of the following is NOT associated with the thin filaments in skeletal muscle: a. tropomyosin b. *titin c. actin d. troponin
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Q1 Muscle contraction can be understood as the consequence of a process of transmission of action potentials from one neuron to another. A chemical called acetylcholine is the neurotransmitter released from the presynaptic neuron. As the postsynaptic cells on the muscle cell membrane receive the acetylcholine‚ the channels for the cations sodium and potassium are opened. These cations produce a net depolarization of the cell membrane and this electrical signal travels along the muscle fibers. Through
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Module 03 Quiz Review Sheet Be sure to read and review the Powerpoints for Chapters 1-3 and 5 for the Quiz! Module 1 - Foundations of Microbiology and Lab Safety – Chapters 1 & 2: Know the various classes of microorganisms and unique features and characteristics of each: Bacteria- one of the two domains of prokaryotes; all medically important prokaryotes are in the domain Bacteria. bacteria are single-celled or noncellular spherical or spiral or rod-shaped organisms that reproduce by fission. Protozoans-Group
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Final Review Sheet 1. A 2-for-1 stock split will: A. Increase the total par value of the stock and increase the number of shares outstanding. B. Decrease the total par value of the stock and increase the number of shares outstanding. C. Not change the total par value of the stock and increase the number of shares outstanding. D. Increase total stockholders’ equity. 2. 73. Which statement is true about a stock split? A. Total shareholders’ equity increases. B. Total shareholders’ equity decreases
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You too can have a healthy skeletal system‚ even in old age Announcer: I just came from the doctor and I am definitely going to start hiking once a week‚ and am going to bump up my exercise routine to three times a week. I also need to get to the grocery store to buy some calcium-rich foods. Radio Personality: You know‚ I am so sick of my doctor telling me what to eat and when to exercise. I am naturally in good shape and can eat whatever I want and still have a great physique. Announcer:
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Exercise 2: Skeletal Muscle Physiology: Activity 3: The Effect of Stimulus Frequency on Skeletal Muscle Contraction Lab Report Pre-lab Quiz Results You scored 100% by answering 4 out of 4 questions correctly. 1. During a single twitch of a skeletal muscle You correctly answered: b. maximal force is never achieved. 2. When a skeletal muscle is repetitively stimulated‚ twitches can overlap each other and result in a stronger muscle contraction than a stand-alone twitch. This phenomenon is known as
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Peer Review Evaluation Sheet: Group 8 <Introduction of Variables> Time management: evaluates whether a group member completed his/her task on time or not. Attendance: evaluates how frequently a group member participated group meeting and tried to involve in group discussion. Preparedness: evaluates whether a group member always brought his/her materials to group meeting or not. Interpersonal contribution: evaluates how frequently a group member contacted other members to ask questions
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Epimysium- covers the entire muscle Perimysium- covers..? Endomysium- covers the individual muscle fibers Sarcomere- smallest contractile element of muscle fiber‚ extends from z-line to z-line Myofilament- responsible for contraction Striated- the color variations on the muscle fiber. Has to do with the amount of protein and the way it reflects light. Myosin- globular protein Bulb like heads come in contact with the active sites on actin Active sites are not exposed when in the resting position
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Muscle Tissue 1. How is muscle tissue categorized? Muscle tissue is categorized by its shape‚ the number of nuclei‚ and the mechanism of stimulation. 2. a. Click the Smooth Muscle Tissue. Identify each of the following: Nucleus----- Smooth Fiber Muscle------------------ b. Describe smooth muscle control (voluntary or involuntary). Involuntary c. Name some smooth muscle functions (click the “Tissue Locations” button). Smooth
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Muscle Contractions By: Evan Contractions‚ put simply‚ are the basic action of any muscle. A contraction is a change in a muscle by which it becomes thickened and shortened after the brain sends signals to nerve cells telling them do contract a specific muscle or muscles. Surprisingly‚ a contraction is a complex human action and reaction‚ yet it is such a breeze to understand the basic meaning of the word. Throughout this essay I will give you extensive details about the process of muscle contractions
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