CHAPTER 3: THE MUSCULAR SYSTEM Three Types of Muscle * Muscle tissue is a collection of cells that shorten during contraction which create tension that results in movement * Tendons are touch bands of connective tissue that join muscle with bones Skeletal muscles * Muscles that are attached to bone (by tendons and other tissue) * Comprise 30 to 40% of human body weight * Humans have conscious control (conscious muscle) over these muscles (the brain can tell them what to do)
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Lessig Activity 1 The Muscle Twitch and the Latent Period 1. 1. Define the terms skeletal muscle fiber‚ motor unit‚ skeletal muscle twitch‚ electrical stimulus‚ and latent period 2. What .is the role of acetylcholine in a skeletal muscle contraction? Skeletal muscle fiber-Skeletal muscle fibers are the individual cells that are bound together in fascicles. Many fascicles are bound together to make a muscle Motor unit-A motor unit consists of a motor neuron and all of the muscle fibers in innervates
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Kreissl et al. EJNMMI Research 2011‚ 1:8 http://www.ejnmmires.com/content/1/1/8 ORIGINAL RESEARCH Open Access Influence of dietary state and insulin on myocardial‚ skeletal muscle and brain [18F]fluorodeoxyglucose kinetics in mice Michael C Kreissl1‚2*‚ David B Stout3‚ Koon-Pong Wong1‚ Hsiao-Ming Wu1‚ Evren Caglayan4‚ Waldemar Ladno3‚ Xiaoli Zhang1‚ John O Prior1‚5‚ Christoph Reiners2‚ Sung-Cheng Huang1 and Heinrich R Schelbert1 Abstract Background: We evaluated the effect of insulin
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the parietal lobe and makes up four distinct fields or regions known as Brodmann area 3a‚ 3b‚ 1‚ and 2. Central sulcus Occipital lobe Temporal lobe Midbrain Pons Medulla oblongata Spinal cord Conclusion 1 The gyri and sulci on the brain greatly increase the brain’s surface area. How do you think this increase in surface area relates to improved brain function? 2 Can you think of another organ in the human body that is shaped specifically to increase surface area
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Results A left gastrocnemius muscle of a frog (L=3.2cm in situ) was used in experiment 1 and 2‚ while a right gastrocnemius muscle of a frog (L=3.4cm in situ) was used in experiment 3. The sciatic nerve of the frog was placed over the stimulatory electrodes covered with a piece of a Kimwipe moistened with Ringer’s solution. The relationship between muscle length‚ force production and velocity of contraction was studied. Force transduced calibration In order to get a more accurate data from force
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EXPERIMENT 2 Measurement of g: Use of a simple pendulum OBJECTIVE: To measure the acceleration due to gravity using a simple pendulum. Textbook reference: pp10-15 INTRODUCTION: Many things in nature wiggle in a periodic fashion. That is‚ they vibrate. One such example is a simple pendulum. If we suspend a mass at the end of a piece of string‚ we have a simple pendulum. Here‚ the to and fro motion represents a periodic motion used in times past to control the motion of grandfather and cuckoo
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Exercise 25 Special Senses: Hearing and Equilibrium Answers to Pre-Lab Quiz (pp. 383–384) 1. three 2. a‚ auricle 3. tympanic membrane 4. d‚ stapes 5. a‚ cochlea 6. otoscope 7. b‚ Rinne 8. b‚ internal ear 9. macula/vestibule 10. c‚ involuntary trailing of eyes in one direction‚ then rapid movement in the other Answers to Activity Questions Activity 4: Conducting Laboratory Tests of Hearing (pp. 387–388) Acuity Test The threshold is indefinite. Sound Localization No‚ the sound is less easily located
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Step 2: Explain what you think will be displayed to the screen in Step 1. (Reference: For loop‚ page 186): List hours starting with Hour 1 up to Hour 24‚ as declared “Max Hours” Step 3: Write a for loop that will print 60 minutes to the screen. Complete the missing lines of code. Constant Integer MAX_MINUTES =60 Declare Integer minutes For Minutes = 1 to Max_Minutes Display “The minute is ”‚ minutes End For Step 4: Write a for loop that will print 60 seconds to the screen.
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Questions Question 1. Question : The correct order for Roman Numerals is: Student Answer: 1‚ 2‚ 3‚ 4‚ 5‚ 6‚ 7… I‚ II‚ III‚ IV‚ V‚ VI‚ VII… I‚ II‚ III‚ IIII‚ X‚ XI‚ XII‚ XIII… 0‚ 1‚ 2‚ 3‚ 4‚ 5‚ 6… Instructor Explanation: Review this week’s course materials for more information on formatting an outline in alpha-numeric format. Points Received: 1 of 1 Comments: Question 2. Question : The concept of “affordances” offers all but one of the following to writers in the research
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UNIT THREE: Music Appreciation Lab Questions At this point‚ you are asked to complete the video journey questions. Each link (the title of the lab) has a set of questions beneath it. Using the link‚ answer the questions that follow. Note that links open up a new browser window. Please include the questions and answers when you submit your assignment in the dropbox. Use appropriate headings in your assignment. Submit the work as one file attachment. This means you complete all work in one word processing
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