When discussing the hierarchy of skeletal muscle organization, theis the Highest level of organization and thethe Smallest level of organization.O Fascicle : Muscle cell (AKA Myocyte, AKA myofiber)O Muscle belly: Muscle cell (AKA Myocyte, AKA myofiber)O Myofbril : SarcomereO Sarcomere: Muscle bellyO Muscle belly Sarcomere« PreviousNext »

Humans consists of various systems one such system is the muscular system that consists of muscle in…

Answered: When discussing the hierarchy of…

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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Muscles relaxatiom occurs when acetylcholine is cleaved from its receptors ,calcium is pulled back into the sarcoplasmic recticulum,the myosin is released from its binding site ,and the muscle fiber returns to its resting lenght true or false
Explain the requirements for Ca2+ and ATP in muscle contraction and relaxation. Remember that myofibers are cells and have cellular metabolic requirements as well.
When utilizing microprocessor technology for testing muscle strength, you are typically looking at what form of muscle contraction? Concentric Isokinetic Isometric Eccentric
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 white
When motor units are recruited to participate in tension development in a muscle, the order of recruitment is typically: Question 13 options: from slow twitch to fast twitch from fast twitch to slow twitch it depends on the type of contraction related to the size and shape of the muscle
Two skeletal muscles A and B contain 1000 and 200 individual muscle fibers respectively. Muscle A has 10 motor units each consisting of one motor neuron and 100 muscle fibers. Muscle B has 20 motor units and each consisting of 10 muscle fibers and one motor neuron. Which muscle can produce a wider range of forces?
Draw a graph of the isometric force–length relationshipof striated muscle, indicating where maximal overlap betweenactin and myosin filaments occurs.
1. Draw and label the steps of the sliding filament mechanism in skeletal muscle. This should be four parts (Cross- bridge, power stroke, disassociation, reactivation). On each part, be sure to include the following structures: actin, myosin, troponin, tropomyosin. Also include ATP, myosin ATPase, ADP, Pi, and H* (where important). • Cross-bridge: . Powerstroke: ● Disassociation: ● Reactivation:
The A bands of a muscle shorten during contraction True False All of the following prefixes refer to muscle except: mys- sarco- myo- muro-
Which statement or statements describe the role of calcium in the stimulation of muscle fibers? Select all that apply. When the action potential reaches the axon terminals of a neuron, calcium channels open and calcium floods into the axon terminal, triggering the release of synaptic vesicles. When calcium ions flood out of the sarcoplasmic reticulum, they bind troponin molecules and troponin removes tropomyosin from the active sites on thin filaments. When myosin thick filaments are walking along actin thin filaments (the cross bridge cycle), calcium ions must be available to bind to myosin so that it can let go of the thin filaments and take another "step". When synaptic vesicles fuse with the plasma membrane of axon terminals, calcium is released into the synaptic cleft and binds to receptors in the motor end plate.
Describe what is happening overall in the first sentence. Then describe, in detail, what is happening in each step below. Include details about what is happening at steps 5 - 7 in terms of calcium and the contraction mechanism (from a different figure). (a) -Axon terminal of somatic motor neuron Muscle fiber ACh- potential Action Na+ Action potential- -Motor end plate- lell Ca2+ released Myosin thick filament 6 + + + ++
Identify the structure highlighted in green: Sarcolemma Myofibril Sarcoplasm

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