The heart is the contractile organ that provides the bloodstream due to excitation-contraction coupling. It has cells that initiate and propagate the excitement like nodal cells and the conductive tissue‚ as well as cells which answer to the excitement by a contraction like myocardial cells or cardiomyocytes.\\ The propagation of the excitation in the heart is also called the propagation of the depolarization wave that is initiated in the sinus node. This spread is not performed continuously between
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between the generation of an action potential and the start of muscle tension development in a muscle fiber? You correctly answered: c. the latent period What occurs during the latent period of these isometric contractions? You correctly answered: b. All the steps of excitation-contraction coupling occur. Experiment Data: Voltage 0.0 3.0 4.0 6.0 8.0 10.0 Length 75 75 75 75 75 75 Active Force 0.00 1.04 1.32 1.65 1.81 1.82 Passive Force 0.00 0.00 0.00 0.00 0.00 0.00 03/21/15 page 2 Total Force 0.00
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muscle tension development in a muscle fiber? Your answer : d. the recess period Correct answer: c. the latent period What occurs during the latent period of these isometric contractions? Your answer : a. The length of the muscle fiber is sliding into an optimal length. Correct answer: b. All the steps of excitation-contraction coupling occur. Experiment Data: Voltage 0.0 3.0 4.0 6.0 8.0 10.0 Length 75 75 75 75 75 75 Active Force 0.00 1.04 1.32 1.65 1.81 1.82 Passive Force 0.00 0.00 0.00 0.00 0.00 0.00
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between the generation of an action potential and the start of muscle tension development in a muscle fiber? You correctly answered: c. the latent period What occurs during the latent period of these isometric contractions? You correctly answered: b. All the steps of excitation-contraction coupling occur. Experiment Data: Voltage 0.0 3.0 4.0 6.0 8.0 10.0 Length 75 75 75 75 75 75 Active Force 0.00 1.04 1.32 1.65 1.81 1.82 Passive Force 0.00 0.00 0.00 0.00 0.00 0.00 Total Force 0.00 1.04 1.32 1.65 1.81
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Group 4 should become experts on excitation-contraction coupling. 5. Group 5 should become experts on summation and tetanus. 6. Group 6 should become experts on smooth muscle contraction. 7. What are the three types of muscle found in the human body? Where can you find each‚ and what does each do? Cardiac – found in the heart Smooth – internal organs and tubes‚ stomach‚ urinary bladder Skeletal – attached to bones 8. What controls the contraction of the different types of muscle
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between the generation of an action potential and the start of muscle tension development in a muscle fiber? You correctly answered: c. the latent period What occurs during the latent period of these isometric contractions? You correctly answered: b. All the steps of excitation-contraction coupling occur. Experiment Data: Voltage 0.0 3.0 4.0 6.0 8.0 10.0 Length 75 75 75 75 75 75 Active Force 0.00 1.04 1.32 1.65 1.81 1.82 Passive Force 0.00 0.00 0.00 0.00 0.00 0.00 Total Force 0.00 1.04 1.32 1.65 1.81
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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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Module Question Answer 8.1 (b) Describe the components of a synovial Joint‚ and identify the functions of each. Components of a synovial joint are: Fibrous articular capsule (or joint capsule)‚ which surrounds the joint Articular cartilages‚ which resemble hyaline cartilages and cover the articulating bone surfaces Synovial fluid‚ which is located within the joint cavity and provides lubrication‚ distributes nutrients‚ and absorbs shocks 8.2 (a) Identify the types of synovial joints based
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and aponeurosis is fibrous or membranous sheet connecting a muscle and the part it moves. 17. (a) Describe the structure of a sarcomere and indicate the relationship of the sarcomere to myofilaments. (b) Explain the sliding filament model of contraction using appropriately labeled diagrams of a relaxed and contracted sarcomere. (a.) The region of a myofibril between two successive Z discs is a sarcomere. It averages 2 micrometers long and is the smallest contractile unit of a muscle fiber. It
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physioex 9.0 Purpose Does the duration of the latent period change with different stimulus voltage? What is the role of acetylcholine in a skeletal muscle contraction? Hypothesis I predict that the latent period will not change if the stimulant is increased or decreased. Materials Human Anatomy &Physiology Marieb/Hoehn PhysioEx™ Lab: Skeletal Muscle Physiology Results/Ananlysis EXERCISE 2 Skeletal Muscle Physiology Name Valerie Jordan_ Lab Time/Date ___ Activity
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