Anatomy Review: Skeletal Muscle Tissue Graphics are used with permission of: Pearson Education Inc.‚ publishing as Benjamin Cummings (http://www.aw-bc.com) Page 1. Introduction • Skeletal muscle cells have unique characteristics which allow for body movement. Page 2. Goals • To compare and contrast smooth muscle cells‚ cardiac muscle cells‚ and skeletal muscle cells. • To review the anatomy of skeletal muscle. • To examine the connective tissue associated with the skeletal muscle. • To review
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Skeletal Muscle Physiology: Frogs & Human Subjects (1‚ 2‚ 5-8‚ 10-12‚ 14-16) 1. There is a greatr concentration of Na+ f ; there is a greater concentration of K+ e . When the stimulus is delivered‚ the ermeability of the membrane at that point is changed; and c ‚ initiating the depolarization of the membrane. Almost as soon as the depolarization wave has begun‚ a repolarization wave follows it across the membrane. This occurs as b . Repolarization restores the h of the resting cell membrane
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REVIEW SHEET EXERCISE 2 Skeletal Muscle Physiology NAME: LAB TIME/DATE: Electrical Stimulation 1. Name each phase of a typical muscle twitch‚ and‚ on the following line‚ describe what is happening in each phase. a. b. c. 2. In Activity 2‚ how long was the latent period? __________ msec Describe the chemical changes that are occurring during this period. The Graded Muscle Response to Increased Stimulus Intensity 3. From Activity 3‚ describe the effect of increasing
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Lab #3: Isotonic contraction and the effect of load on skeletal muscles Abstract The job of the motor nervous system is to control certain elements in muscles simultaneously to ultimately produce movement. Movement of the body is the result of specialized cells directly associated with skeletal muscle. Skeletal muscles are voluntary muscle and must contract before movement can occur. We know the muscle team moving the arm is formed at the biceps and triceps. Biceps can bend the elbow‚ but
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REVIEW SHEET EXERCISE 2 Skeletal Muscle Physiology NAME: LAB TIME/DATE:9pm.. 4.8.11 Electrical Stimulation 1. Name each phase of a typical muscle twitch‚ and‚ on the following line‚ describe what is happening in each phase. a. Latent-stage from rest to muscle tension begins b. Contraction-At this stage the muscle reaches its peak in contraction c. Relaxation- muscle is shortened‚ returns to zero and back initial length. 2. In Activity 2‚ how long was the latent period? ___2
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tissue in a muscle. Epimysium (sheet of connective tissue that covers a muscle as a whole)‚ endomysium (delicate connective tissue membrane covering the highly specialized skeletal muscle fibers) ‚( perimysium (tough connective tissue surrounding fascicles) 2. Myofibrils are composed primarily of two protein filaments called _____________actin__________ and ___myosin_______________________. 3. What is a motor unit? Functional unit composed of a single motor neuron with the muscle cells it innervates
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Exercise 2: Skeletal Muscle Physiology Worksheet Single Stimulus Activity 1: Identifying the Latent Period 1. How long is the latent period? 2.78 msec 2. Does the latent period change with different stimulus voltages?No Activity 2: Identifying the Threshold Voltage 1. What do you see in the Active Force display?I saw a very slight peak at .8 2. What is the threshold voltage? .8 V 3. How does the graph generated at the threshold voltage differ from the graphs generated
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Exercise 2: Skeletal Muscle Physiology: Activity 1: The Muscle Twitch and the Latent Period Lab Report Pre-lab Quiz Results You scored 20% by answering 1 out of 5 questions correctly. 1. Skeletal muscles are connected to bones by Your answer : c. ligaments. Correct answer: b. tendons. 2. Skeletal muscles are composed of hundreds to thousands of individual cells called Your answer : b. myofibrils. Correct answer: c. fibers. 3. The term motor unit refers to Your answer : a. all of the motor neurons
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Exercise 2: Skeletal Muscle Physiology: Activity 6: The Skeletal Muscle Length-Tension Relationship Lab Report Pre-lab Quiz Results You have not completed the Pre-lab Quiz. 07/08/13 page 1 Experiment Results Predict Question: Predict Question: As the resting length of the muscle is changed‚ what will happen to the amount of total force the muscle generates during the stimulated twitch? Your answer : d. An increase in muscle length will decrease the total force. Stop & Think Questions: Note
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found in animals: connective‚ muscle‚ nervous‚ and epithelial. We are going to go into muscle tissue. The cells of muscle tissues are called fibers. There are three types of muscle tissue and they are skeletal‚ cardiac‚ and smooth. All types can go though hypertrophy (enlargement or overgrowth of an organ or part of the body due to the increased size of the constituent cells). Muscle fibers contract due to the interaction of the contractile proteins‚ actin and myosin. Muscle contraction generates contractile
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